On the viability of in-situ alloyed Ti-1Fe as a strong and ductile alternative to Ti-6Al-4V for laser-based powder bed fusion

Jeff HUANG, Ammarueda ISSARIYAPAT, Shota KARIYA, Junko UMEDA, Katsuyoshi KONDOH

Additive Manufacturing　Vol. 105　p. 104788-104788　2025/04/14　Research paper (scientific journal)

Direct Bonding Mechanism of Titanium and PET Resin via Heating and Pressurization: Influence of Bubble Dynamics on Bonding Strength

Katsuyoshi Kondoh, Nodoka Nishimura, Kazuki Shitara, Shota Kariya, Ke Chen, Junko Umeda

Journal of Advanced Joining Processes　Vol. 11　p. 100301-100301　2025/03/28　Research paper (scientific journal)

Microstructure and mechanical properties of nano TiB whisker-reinforced titanium matrix composites using atomized Ti-TiB composite powder as raw materials

Lei Liu, Shufeng Li, Shaolong Li, Huiying Liu, Shaodi Wang, Dongxu Hui, Xin Zhang, Shota Kariya, Ammarueda Issariyapat, Junko Umeda, Katsuyoshi Kondoh, Bolv Xiao, Zongyi Ma

Composites Part B: Engineering　Vol. 298　2025/03/10　Research paper (scientific journal)

Microstructures in Heat Treated LPBF Ti-6Al-4V Alloys after α′phase Decomposition and their Mechanical Properties

Reita ANAN, Shota KARIYA, Shufeng LI, Yafeng YANG, Junko UMEDA, Katsuyoshi KONDOH

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 72　No. 4　p. 79-84　2025/03/07　Research paper (scientific journal)

Identification of Strengthening Factors in Hot-rolled Dual Phase PM Ti-Fe Alloys by a Machine Learning Approach

Ayane HIRAKO, Shota KARIYA, Junko UMEDA, Kenta YAMANAKA, Xiaochun LI, Katsuyoshi KONDOH

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 72　No. 3　p. 73-78　2025/02/08　Research paper (scientific journal)

Overcoming strength-ductility trade-off in pelleted heterostructure titanium matrix composites by optimizing pellet size

Lei Liu, Shufeng Li, Shaolong Li, Huiying Liu, Shaodi Wang, Dongxu Hui, Xin Zhang, Shota Kariya, Junko Umeda, Katsuyoshi Kondoh, Abdollah Bahador, Bolv Xiao, Zongyi Ma

Materials Characterization　Vol. 222　2025/01/31　Research paper (scientific journal)

Sustainable alloy design: Fe-enhanced Ti alloys for superior mechanical performance in additive manufacturing

Ammarueda Issariyapat, Jeff Huang, Shota Kariya, Biao Chen, Shufeng Li, Junko Umeda, Kenta Yamanaka, Akihiko Chiba, Katsuyoshi Kondoh

Journal of Alloys and Compounds　Vol. 1010　2025/01/05　Research paper (scientific journal)

Synthesis mechanism and interface contribution towards the strengthening effect of in-situ Ti5Si3 reinforced Al matrix composites

Xin Zhang, Xin Li, Jun Wang, Lei Liu, Shaolong Li, Bo Li, Xiaodong Hou, Jianbo Gao, Shota Kariya, Junko Umeda, Katsuyoshi Kondoh, Shufeng Li

Materials Science & Engineering A　Vol. 918　2024/12/26　Research paper (scientific journal)

Microstructure, mechanical, and magnetic properties of powder metallurgy FeCoNiSi-Cu, FeCoNiSi-Mn, and FeCoNiSi-Tiequiatomic HEAs manufactured by spark plasma sintering

Shimaa Abolkassem, Ayman Elsayed, Shota Kariya, Junko Umeda, Katsuyoshi Kondoh

Journal of Materials Research and Technology　2024/11/28　Research paper (scientific journal)

Strengthening Mechanism of Powder Metallurgy Hot-rolled Ti-Zr-TiC Composites

Sei MIYAMOTO, Shota KARIYA, Junko UMEDA, Biao CHEN, Jianghua SHEN, Shufeng LI, Abdulaziz N. ALHAZAA, Katsuyoshi KONDOH

Journal of the Japan Society of Powder and Powder Metallurgy　2024/08　Research paper (scientific journal)

Microstructure and Strengthening Mechanism of Fe-Supersaturated α Titanium alloy Produced by Laser Powder Bed Fusion

Shota KARIYA, Issariyapat AMMARUEDA, Abdolah BAHADOR, Ma Qian, Junko UMEDA, Katsuyoshi KONDOH

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 71　No. 12　p. 686-692　2024/07/03　Research paper (scientific journal)

Microstructural Formation Mechanism of α+β Dual Phase Ti-Fe Sintered Alloys via Hot Rolling Process

Shota KARIYA, Takayuki TANAKA, Junko UMEDA, Yafeng YANG, Shaofu LI, Anak KHANTACHAWANA, Abdolah BAHADOR, Katsuyoshi KONDOH

Journal of the Japan Society of Powder and Powder Metallurgy　2024/06　Research paper (scientific journal)

Cost Effective In-Situ Alloying of Ti-Fe via Laser Powder Bed Fusion

J. Huang, A. Issariyapat, S. Kariya, J. Umeda, K. Kondoh

International Journal of Powder Metallurgy　Vol. 59　No. 4　2024/06　Research paper (scientific journal)

Carbon Solid Solution Effect on Microstructures of Laser Powder Bed Fusion Prepared Ti Alloys

Shota KARIYA, Eri ICHIKAWA, Issariyapat AMMARUEDA, Junko UMEDA, Biao CHEN, Abdolah BAHADOR, Katsuyoshi KONDOH

Journal of the Japan Society of Powder and Powder Metallurgy　2024/03　Research paper (scientific journal)

Synthesis mechanism of pelleted heterostructure Ti64-TiB composites via an interdiffusion and self-organization strategy based on powder metallurgy

Lei Liu, Shufeng Li, Xin Zhang, Shaolong Li, Shaodi Wang, Bo Li, Lina Gao, Huiying Liu, Dongxu Hui, Deng Pan, Shota Kariya, Junko Umeda, Katsuyoshi Kondoh

Composites Part B　Vol. 276　2024/03　Research paper (scientific journal)

Microstructures Formation and Strengthening Mechanism of Ultra-Rapidly Solidified Powder Metallurgy Ti-Si Alloys via Hot Rolling Process

Shota KARIYA, Yuudai HAYASHI, Ammarueda ISSARIYAPAT, Junko UMEDA, Seung-Ki MOON, Biao CHEN, Shufeng LI, Katsuyoshi KONDOH

Journal of the Japan Society of Powder and Powder Metallurgy　2024/02　Research paper (scientific journal)

Strengthening Mechanism of Ti-Zr Sintered Alloys with Sc Addition

Shota KARIYA, Kouki NAGATA, Junko UMEDA, Biao CHEN, Jianghua SHEN, Shufeng LI, Katsuyoshi KONDOH

Journal of the Japan Society of Powder and Powder Metallurgy　2024/02　Research paper (scientific journal)

Microstructure and Strengthening Mechanism of Powder Metallurgy Extruded Titanium Alloys with Carbon Solid Solution

Shota Kariya, Eri ICHIKAWA, Takuma TERAMAE, Shufeng LI, Xiaochun LI, Katsuyoshi KONDOH, Junko Umeda

Journal of the Japan Society of Powder and Powder Metallurgy　2024/02　Research paper (scientific journal)

Novel tensile deformation mode in laser powder bed fusion prepared Ti-O alloy

Shota Kariya, Ammarueda Issariyapat, Abdollah Bahador, Junko Umeda, Jianghua Shen, Kenta Yamanaka, Akihiko Chiba, Katsuyoshi Kondoh

Materials Science & Engineering A　Vol. 892　2023/12　Research paper (scientific journal)

Influence of thermo-mechanical processing on microstructure and properties of bulk metallic glassy alloys-reinforced Al matrix composites prepared by powder metallurgy

Shimaa Abolkassem, Ayman Elsayed, Shota Kariya, Junko Umeda, Katsuyoshi Kondoh

Journal of Materials Research and Technology　Vol. 27　p. 8197-8208　2023/11　Research paper (scientific journal)

Microstructure and mechanical properties of hybrid nano-titanium carbide-carbon nanotubes (nano-TiC-CNT) reinforced aluminium matrix composite

Peter Nyanora, Hossam M. Yehiab, Abdollah Bahadorc, Junko Umeda, Katsuyoshi Kondoh, Mohsen A. Hassand

Advanced Composite Materials　2023/10　Research paper (scientific journal)

Mechanical Functionalization of Additively Manufactured Titanium with Light Elements

Katsuyoshi KONDOH, Eri ICHIKAWA, Ammarueda ISSARIYAPAT, Junko UMEDA

Journal of the Japan Society of Powder and Powder Metallurgy　2023/09　Research paper (scientific journal)

Microstructure and mechanical properties of powder metallurgy Ti-TiBw-xFe titanium matrix composites using Ti-TiBw composite powder

Shaodi Wang, Shufeng Li, Lei Liu, Shaolong Li, Lina Gao, Huiying Liu, Xin Zhang, Bo Li, Biao Chen, Junko Umeda, Katsuyoshi Kondoh, Shengyin Zhou

Journal of Materials Science　Vol. 58　p. 13662-13667　2023/09　Research paper (scientific journal)

The mechanical and microstructural behavior of heat treated, texture-controlled Ti-10%Mo alloys manufactured by laser powder bed fusion

Jack Peterson, Ammarueda Issariyapat, Shota Kariya, Junko Umeda, Katsuyoshi Kondoh

Materials Science & Engineering A　Vol. 884　2023/08　Research paper (scientific journal)

Excellent tensile yield strength with ultrafine grain and tailored microstructure in plastically deformed Ti-Re alloys

Abdollah Bahador, Astuty Amrin, Shota Kariya, Ammarueda Issariyapat, Ozkan Gokcekaya, Guohua Zhao, Junko Umeda, Yafeng Yang, Ma Qian, Katsuyoshi Kondoh

Journal of Alloys and Compounds　Vol. 967　2023/07　Research paper (scientific journal)

Loss-free tensile ductility of dual-structure titanium composites via an interdiffusion and self-organization strategy

Lei Liu, Shufeng Li, Deng Pan, Dongxu Hui, Xin Zhang, Bo Li, Tianshou Liang, Pengpeng Shi, Abdollah Bahador, Junko Umeda, Katsuyoshi Kondoh, Lina Gao, Zhimao Wang, Gang Li, Shuyan Zhang, Ruihong Wang, Wenge Chen

PNAS　Vol. 120　No. 28　2023/07　Research paper (scientific journal)

Microstructure refinement and strengthening mechanisms of additively manufactured Ti-Zr alloys prepared from pre-mixed feedstock

Ammarueda Issariyapat, Jeff Huang, Takuma Teramae, Shota Kariya, Abdollah Bahador, Patama Visuttipitukul, Junko Umeda, Abdulaziz Alhazaa, Katsuyoshi Kondoh

Additive Manufacturing　Vol. 73　2023/06　Research paper (scientific journal)

Controlling Intermetallic Compound Distribution in Additively Manufactured Ti-Cu Alloys by Heat Treatment

Hiroki HANADA, Shota KARIYA, Kazuki SHITARA, Junko UMEDA, Katsuyoshi KONDOH

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 70　No. 6　p. 290-297　2023/06　Research paper (scientific journal)

Influence of two-step austempering at different temperatures on mechanical and microstructural properties of AISI 9254 high silicon steel

Burak Nalcaci, Meltem Baysun, Abdollah Bahador, Junko Umeda, Sebastian Munstermann, Ali Arslan Kaya, Mehmet Erdogan

Ironmaking & Steelmaking　Vol. 50　p. 1331-1339　2023/05　Research paper (scientific journal)

Effect of grain size on the tensile ductility and fracture mechanism of Ti-O alloys

Shota Kariya, Ammarueda Issariyapat, Abdollah Bahador, Junko Umeda, Jianghua Shen, Katsuyoshi Kondoh

Materials Science & Engineering A　Vol. 874　2023/04　Research paper (scientific journal)

Experimentally mapping the oriented-to-misoriented transition in laser powder bed fusion Ti-10%Mo alloys

Jack Peterson, Shota Kariya, Ammarueda Issariyapat, Junko Umeda, Katsuyoshi Kondoh

Scripta Materialia　Vol. 231　2023/04　Research paper (scientific journal)

Precision control of oxygen content in CP-Ti for ultra-high strength through titanium oxide decomposition: An in-situ study Xianzhe Shi

Xiuxia Wang, Biao Chen, Junko Umeda, Abdollah Bahador, Katsuyoshi Kondoh, Jianghua Shen

Materials & Design　Vol. 227　2023/02　Research paper (scientific journal)

An in-situ study of static recrystallization in Mg using high temperature EBSD

Xu Ye, Zhe Suo, Zhonghao Heng, Biao Chen, Qiuming Wei, Junko Umeda, Katsuyoshi Kondoh, Jianghua Shen

Journal of Magnesium and Alloys　2023/02　Research paper (scientific journal)

Effect of Bimodal Grain Structure on the Yielding Behavior of Commercial Purity Titanium Under Quasi-static Tension

Xianzhe Shi, Xiuxia Wang, Biao Chen, Junko Umeda, Katsuyoshi Kondoh, Jianghua Shen

Metals and Materials International　Vol. 229　p. 2207-2215　2023/01　Research paper (scientific journal)

Rose bengal-decorated rice husk-derived silica nanoparticles enhanced singlet oxygen generation for antimicrobial photodynamic inactivation

Nanase Mori, Hideya Kawasaki, Erika Nishida, Yukimi Kanemoto, Hirofumi Miyaji, Junko Umeda, Katsuyoshi Kondoh

Journal of Materials Science　Vol. 58　p. 2801-2813　2023/01　Research paper (scientific journal)

チタン合金積層造形体の組織形成に及ぼす不純物酸素の影響

刈屋 翔太, Ammarueda Issaryapat, 梅田 純子, 近藤 勝義

ふぇらむ　Vol. 27　No. 12　p. 906-912　2022/12

Advanced Coating Process of Un-bundled Carbon Nanotubes on Titanium Plate to Improve Tribological Property and Biocompatibility

Junko UMEDA, Hirofumi MIYAJI, Bunshi FUGETSU, Seung Ki MOON, Anak KHANTACHAWANA, Shota KARIYA, Katsuyoshi KONDOH

2022/11　Research paper (international conference proceedings)

Advanced Powder Metallurgy Process for High-strengthened Titanium Materials Using Ubiquitous Solid Solutes

Katsuyoshi Kondoh, Shota Kariya, Ammarueda Issariyapat, Shufeng Li, Junko Umeda

2022/11　Research paper (international conference proceedings)

High Strength Ti-Zr Alloys With Balanced Ductility Fabricated By Powder Metallurgy And Additive Manufacturing Routes

K. Kondoh, A. Issariyapat, S. Kariya, S. Li, A. Alhazaa, J. Umeda

2022/10　Research paper (international conference proceedings)

Tribological Behavior of Titanium-Sintered Composites with Ring-Shaped TiN Dispersoids

Junko Umeda, Hiroko Fujii, Ryota Takizawa, Takuma Teramae, Ammarueda Issariyapat, Shota Kariya, Yafeng Yang, Shufeng Li, Katsuyoshi Kondoh

Lubricants　Vol. 10　2022/10　Research paper (scientific journal)

Room temperature and high-temperature properties of extruded Ti-4Fe-3W/2TiC composites in a+b and b phases

Abdollah Bahador, Ayhan Yurtsever, Astuty Amrin, Shota Kariya, Junko Umeda, Jianghua Shen, Biao Chen, Takeshi Fukuma, Katsuyoshi Kondoh

Materials & Design　Vol. 220　2022/06　Research paper (scientific journal)

The Effects of Heat Treatment and Carbon Content on the Mirostructure and Mechnical Properties of Laser Powder Bed Fision Ti-6Al-4V with Dissolved TiC Particles

Jack Peterson, Ammarueda Issariyapa, Junko Umeda, Katsuyoshi Kondoh

Journal of Alloys and Compounds　Vol. 920　2022/06　Research paper (scientific journal)

Solute-induced near-isotropic performance of laser powder bed fusion manufactured pure titanium

Ammarueda Issariyapat, Shota Kariya, Kazuki Shitara, Junko Umeda, Katsuyoshi Kondoh

Additive Manufacturing　Vol. 56　2022/05　Research paper (scientific journal)

Microstructure and mechanical characterizations of additively manufactured high oxygen-doped titanium

Wendi Shi, Yahui Yang, Nan Kang, Minjie Wang, Biao Chen, Yulong Li, Umeda Junko, Katsuyoshi Kondoh, Jianghua Shen

Materials Characterization　Vol. 189　2022/05　Research paper (scientific journal)

Investigation into the Intermetallic Layers in Ti/Al Multi-Layer Composites Produced via Accumulative Rolling and Sintering

Yahui Yang, Jianghua Shen, Junko Umeda, Katsuyoshi Kondoh, Yulong Li

Science of Advanced Materials　Vol. 14　p. 1-6　2022/04　Research paper (scientific journal)

First-principles design and experimental validation of β-Ti alloys with high solid-solution strengthening and low elasticities

Kazuki Shitara, Katsuya Yokota, Masato Yoshiya, Junko Umeda, Katsuyoshi Kondoh

Materials Science & Engineering A　Vol. 843　2022/04　Research paper (scientific journal)

Local galvanic corrosion analysis on cast Mg-Ca binary alloy using scanning Kelvin probe force microscopy

Katsuyoshi Kondoh, Rei Takei, Shota Kariya, Shufeng Li, Junko Umeda

Materials Letters　2022/04　Research paper (scientific journal)

Ductility improvement of high-strength Ti-O material upon heteromicrostructure formation

Shota Kariya, Ammarueda Issariyapat, Abdollah Bahador, Junko Umeda, Jianghua Shen, Katsuyoshi Kondoh

Materials Science and Engineering: A　2022/03　Research paper (scientific journal)

Quantitative analysis on surface potentials of impurities and intermetallic compounds dispersed in Mg alloys using scanning Kelvin probe force microscopy and ultraviolet photoelectron spectroscopy

Katsuyoshi Kondoh, Rei Takei, Shota Kariya, Shufeng Li, Junko Umeda

Materials Chemistry and Physics　2022/01　Research paper (scientific journal)

Compressive behavior of CNT-reinforced aluminum matrix composites under various strain rates and temperatures

Minjie Wang, Jianghua Shen, Biao Chen, Yunfei Wang, Junko Umeda, Katsuyoshi Kondoh, Yulong Li

Ceramics International　2021/12　Research paper (scientific journal)

Advanced tensile properties and strain rate sensitivity of titanium matrix composites reinforced with CaTiO3 particles

Jinheng Yang, Jianghua Shen, Yanxiang Liang, Wendi Shi, Biao Chen, Junko Umeda, Katsuyoshi Kondoh

Journal of Alloys and Compounds　Vol. 897　2021/12　Research paper (scientific journal)

Micro-compression of high oxygen doped single-crystal titanium along different orientations

Xiuxia Wang, Siyu Lu, Biao Chen, Umeda Junko, Yoji Shibutani, Katsuyoshi Kondoh, Jianghua Shen

Materials Science and Engineering: A　Vol. 832　2021/12　Research paper (scientific journal)

Enhanced strength and ductility of nano-TiBw-reinforced titanium matrix composites fabricated by electron beam powder bed fusion using Ti6Al4V-TiBw composite powder

Deng Pan, Shufeng Li, Lei Liu, Xin Zhang, Bo Li, Biao Chen, Mingqiang Chu, Xiaodong Hou, Zhonggang Sun, Junko Umeda, Katsuyoshi Kondoh

Additive Manufacturing　Vol. 50　2021/11　Research paper (scientific journal)

ASB induced phase transformation in high oxygen doped commercial purity Ti

Wendi Shi, Siyu Lu, Jianghua Shen, Biao Chen, Junko Umeda, Qiuming Wei, Katsuyoshi Kondoh, Yulong Li

Materials Science and Engineering: A　Vol. 830　2021/11　Research paper (scientific journal)

Quantitative strengthening evaluation of powder metallurgy titanium alloys with substitutional Zr and interstitial O solutes via homogenization heat treatment

Katsuyoshi Kondoh, Shota Kariya, Anak Khantachawana, Abdulaziz Alhazaa, Junko Umeda

Materials　Vol. 14　No. 21　2021/11　Research paper (scientific journal)

Additive Manufacturing and Characterization of High Strength Ti-Zr Gyroid Scaffolds Using Pre-Mixed Ti-ZrH2 Powders

Ammarueda Issariyapat, Shota Kariya, Abdulaziz Alhazaa, Junko Umeda, Katsuyoshi Kondoh

JOM　Vol. 73　No. 12　p. 4166-4176　2021/10　Research paper (scientific journal)

負の添加元素が拓くチタン積層造形材の力学機能化

近藤 勝義, 梅田 純子, Ammarueda Issariyapat, 刈屋 翔太, 市川 絵理

生産と技術　Vol. 73　No. 4　p. 18-21　2021/09

Ultrafine-grain formation and improved mechanical properties of novel extruded Ti-Fe-W alloys with complete solid solution of tungsten

Abdollah Bahador, Junko Umeda, Ridvan Yamanoglu, Astuty Amrin, Abdulaziz Alhazaa, Katsuyoshi Kondoh

Journal of Alloys and Compounds　Vol. 875　2021/09　Research paper (scientific journal)

Strengthening and deformation mechanism of selective laser-melted high-concentration nitrogen solute α-Ti materials with heterogeneous microstructures via heat treatment

Ammarueda Issariyapat, Abdollah Bahador, Patama Visuttipitukul, Shufeng Li, Junko Umeda, Katsuyoshi Kondoh

Materials Science and Engineering: A　Vol. 826　2021/08　Research paper (scientific journal)

Syntheses, microstructure evolution and performance of strength-ductility matched aluminum matrix composites reinforced by nano SiC-cladded CNTs

Lei Liu, Shufeng Li, Xin Zhang, Deng Pan, Lina Gao, Biao Chen, Junko Umeda, Katsuyoshi Kondoh

Materials Science and Engineering: A　Vol. 824　2021/07　Research paper (scientific journal)

Strength-ductility balance of powder metallurgy Ti-2Fe-2W alloy extruded at high-temperature

Abdollah Bahador, Ammarueda Issariyapat, Junko Umeda, Ridvan Yamanoglu, Catalin Pruncu, Astuty Amrin, Katsuyoshi Kondoh

Journal of Materials Research and Technology　Vol. 14　p. 677-691　2021/07　Research paper (scientific journal)

Substantial role of charge transfer on the diffusion mechanism of interstitial elements in α-titanium: A First-principles study

Kazuki Shitara, Masato Yoshiya, Junko Umeda, Katsuyoshi Kondoh

Scripta Materialia　Vol. 203　2021/06　Research paper (scientific journal)

TiB Whisker and Nitrogen Solid-Solution Synergistic-Strengthened Titanium Matrix Composites by Ti-BN via Spark Plasma Sintering and Hot Extrusion

Deng Pan, Shufeng Li, Lina Gao, Lei Liu, Xin Zhang, Xinghua Ji, Junko Umeda, Katsuyoshi Kondoh

Advanced Engineering Materials　Vol. 23　2021/06　Research paper (scientific journal)

Development of core-shell-structured Ti-(N) powders for additive manufacturing and comparison of tensile properties of the additively manufactured and spark-plasma-sintered Ti-N alloys

A. Issariyapat, T. Song, P. Visuttipitukul, J. Umeda, Q. Ma, K. Kondoh

Advanced Powder Technology　Vol. 32　No. 7　p. 2379-2389　2021/05　Research paper (scientific journal)

Solid-solution Strengthening Mechanism of Ti-Zr Sintered Alloy with Biocompatibility

Katsuyoshi Kondoh, Takuma Teramae, Kazuki Shitara, Junko Umeda

Titanium　Vol. 69　No. 2　p. 43-49　2021/04

Precipitation and Distribution Behavior of In Situ-Formed TiB Whiskers in Ti64 Composites Fabricated by Selective Laser Melting

Junko Umeda, Lei Jia, Biao Chen, Ke Chen, Shufeng Li, Kazuki Shitara, Katsuyoshi Kondoh

Crystals　Vol. 11　No. 4　2021/04　Research paper (scientific journal)

The rate-dependent mechanical behavior of CNT-reinforced aluminum matrix composites under tensile loading

M. Wang, Y. Li, B. Chen, D. Shi, J. Umeda, K. Kondoh, J. Shen

Materials Science and Engineering: A　Vol. 808　2021/03　Research paper (scientific journal)

In-Situ Formed Al3Zr Compounds Reinforced Al Composites and Tribological Application

Junko Umeda, Nodoka Nishimura, Hiroko Fujii, Lei Jia, Katsuyoshi Kondoh

Crystals　Vol. 11　No. 3　2021/02　Research paper (scientific journal)

レーザ積層造形法により作製した酸素固溶チタン材における結晶組織と強化機構

市川 絵理, 設樂 一希, 梅田 純子, Shufeng LI, Biao CHEN, 近藤 勝義

粉体および粉末冶金　Vol. 68　No. 2　p. 67-75　2021/02　Research paper (scientific journal)

Effect of sintering temperature on the microstructure and mechanical properties of the Ti-2.5Zr alloy

Abdulaziz Alhazaa, Abdulaziz Assaifan, Mahmoud Hezam, Muhammad Ali Shar, Junko Umeda, Katsuyoshi Kondoh

Materials Research Express　Vol. 8　2021/01　Research paper (scientific journal)

Fundamental Research on Multi-functional Materials by Atomic to Micron Trans-scale Design and Their Applications

Junko UMEDA

Journal of Smart Processing　Vol. 10　No. 1　p. 3-9　2021/01

Microstructures analysis and quantitative strengthening evaluation of powder metallurgy Ti-Fe binary extruded alloys with (α+β)-dual-phase

Junko Umeda, Takayuki Tanaka, Takuma Teramae, Shota Kariya, Junji Fujita, Hiroshi Nishikawa, Yoji Shibutani, Jianghua Shen, Katsuyoshi Kondoh

Materials Science and Engineering: A　Vol. 803　2021/01　Research paper (scientific journal)

Microstructure globularization of high oxygen concentration dual-phase extruded Ti alloys via powder metallurgy route

Abdollah Bahador, Junko Umeda, Hamidreza Ghandvar, Tuty Asma Abu Bakar, Ridvan Yamanoglu, Ammarueda Issariyapat, Katsuyoshi Kondoh

Materials Characterization　Vol. 172　2020/12　Research paper (scientific journal)

Acicular microstructure formation and strengthening behavior of Ti-4%Fe alloys by Zr addition

Takuma Teramae, Takayuki Tanaka, Mizuki Fukuo, Kazuki Shitara, Junko Umeda, Shufeng Li, Abdulaziz Alhazaad, Katsuyoshi Kondoh

Journal of Alloys and Compounds　Vol. 858　2020/12　Research paper (scientific journal)

Mechanisms of Tensile Strengthening and Oxygen Solid Solution in Single β-Phase Ti-35 at.%Ta+O Alloys

Katsuya Yokota, Abdollah Bahador, Kazuki Shitara, Junko Umeda, Katsuyoshi Kondoh

Materials Science and Engineering: A　Vol. 802　2020/12　Research paper (scientific journal)

Tensile properties improvement by homogenized nitrogen solid solution strengthening of commercially pure titanium through powder metallurgy process

Ammarueda Issariyapat, Patama Visuttipitukul, Tingting Song, Abdollah Bahador, Junko Umeda, Ma Qian, Katsuyoshi Kondoh

Materials Characterization　Vol. 170　2020/10　Research paper (scientific journal)

その場合成法によるAl3Zr粒子分散Al基焼結複合材の創製および摩擦摩耗特性

西村 のどか, 梅田 純子, 藤井 寛子, Lei JIA, 近藤 勝義

粉体および粉末冶金　Vol. 67　No. 10　p. 536-542　2020/10　Research paper (scientific journal)

Understanding Corrosion Behavior of Magnesium Surface by x-Ray Irradiation for Improved Surface Design and Applications

Katsuyoshi Kondoh, Keisuke Funatsu, Makoto Takahashi, Shufeng Li, Fumiteru Akamatsu, Junko Umeda

JOM　Vol. 72　No. 10　2020/10　Research paper (scientific journal)

Strengthening evaluation and high-temperature behavior of Ti-Fe-O-Cu-Si alloy

Abdollah Bahador, Junko Umeda, Ridvan Yamanoglu, Tuty Asma Abu Bakar, Katsuyoshi Kondoh

Materials Science and Engineering: A　Vol. 800　2020/09　Research paper (scientific journal)

Quantitative strengthening evaluation of powder metallurgy Ti-Zr binary alloys with high strength and ductility

Katsuyoshi Kondoh, Mizuki Fukuo, Shota Kariya, Kazuki Shitara, Shufeng Li, Abdulaziz Alhazaa, Junko Umeda

Journal of Alloys and Compounds　Vol. 852　2020/09　Research paper (scientific journal)

Refined grain formation behavior and strengthening mechanism of α-titanium with nitrogen fabricated by selective laser melting

Ammarueda Issariyapat, Patama Visuttipitukul, Junko Umeda, Katsuyoshi Kondoh

Additive Manufacturing　Vol. 36　2020/08　Research paper (scientific journal)

Improved ductility of spark plasma sintered aluminium-carbon nanotube composite through the addition of titanium carbide microparticles

Peter Nyanor, Abdollah Bahador, Omayma A. El-Kady, Junko Umeda, Katsuyoshi Kondoh, Mohsen A. Hassan

Materials Science and Engineering: A　Vol. 795　2020/07　Research paper (scientific journal)

Deformation mechanism and enhanced properties of Cu-TiB2 composites evaluated by the in-situ tensile test and microstructure characterization

Abdollah Bahador, Junko Umeda, Ridvan Yamanoglu, Hamidreza Ghandvar, Ammarueda Issariyapat, Tuty Asma Abu Bakar, Katsuyoshi Kondoh

Journal of Alloys and Compounds　Vol. 847　2020/07　Research paper (scientific journal)

Reduction Mechanism of Thermally Stable CaO during Heating Mg-Al Composites with CaO Particles

Junko Umeda, Junji Fujita, Shufeng Li, Katsuyoshi Kondoh

Journal of Scientific and Engineering Research　Vol. 7　p. 85-93　2020/07　Research paper (scientific journal)

Comparison study on mechanical properties of powder metallurgy titanium materials with nitrogen solutes and TiN dispersoids

Junko Umeda, Hiroki Ishizaka, Shufeng Li, Abdulaziz Alhzaa, Katsuyoshi Kondoh

Journal of Alloys and Compounds　Vol. 846　2020/07　Research paper (scientific journal)

Mechanical properties and biocompatibility of titanium with a high oxygen concentration for dental implants

Huiwen Luo, Yulu Wu, Xiaoou Diao, Wendi Shi, Fan Feng, Fei Qian, Junko Umeda, Katsuyoshi Kondoh, Haitao Xin, Jianghua Shen

Materials Science and Engineering: C　Vol. 117　2020/07　Research paper (scientific journal)

Tensile property enhancement by oxygen solutes in selectively laser melted titanium materials fabricated from pre-mixed pure Ti and TiO2 powder

Katsuyoshi Kondoh, Eri Ichikawa, Ammarueda Issariyapat, Kazuki Shitara, Junko Umeda, Biao Chen, Shufeng Li

Materials Science and Engineering: A　Vol. 795　2020/07　Research paper (scientific journal)

選択的レーザー溶融法で作製したチタン積層造形体における酸素固溶強化

近藤 勝義, 市川 絵理, Ammarueda Issariyapat, Patama Visuttipitukul, 設樂 一希, 梅田 純子

スマートプロセス学会誌　Vol. 9　No. 4　p. 158-163　2020/07

An in-situ study on deformation and cracking initiation in oxygen-doped commercial purity titanium

Jianghua Shen, Biao Chen, Junko Umeda, Jiong Zhang, Yulong Li, Katsuyoshi Kondoh

Mechanics of Materials　Vol. 148　2020/06　Research paper (scientific journal)

チタン材料における酸素や窒素による固溶強化

近藤 勝義, 刈屋 翔太, Patama Visuttipitukul, 梅田 純子

素形材　Vol. 61　No. 6　p. 24-32　2020/06

Effect of quenching media on the properties of TiNi shape memory alloys fabricated by powder metallurgy

Ayman Elsayed, Junko Umeda, Katsuyoshi Kondoh

Journal of Alloys and Compounds　Vol. 842　2020/06　Research paper (scientific journal)

Selective laser-melted titanium materials with nitrogen solid solutions for balanced strength and ductility

Katsuyoshi Kondoh, Ammarueda Issariyapat, Junko Umeda, Patama Visuttipitukul

Materials Science and Engineering: A　Vol. 790　2020/06　Research paper (scientific journal)

Ductility Improvement Mechanism of Ti-6Al-4V+O Sintered Material

Kento Kamiyama, Shota Kariya, Mizuki Fukuo, Junko Umeda, Katsuyoshi Kondoh

Materials Transactions　Vol. 61　No. 3　p. 430-437　2020/02　Research paper (scientific journal)

Strength-ductility improvement of extruded Ti-(N) materials using pure Ti powder with high nitrogen solution

Ammarueda Issariyapat, Patama Visuttipitukul, Tingting Song, Junko Umeda, Ma Qian, Katsuyoshi Kondoh

Materials Science and Engineering: A　Vol. 779　2020/02　Research paper (scientific journal)

Mechanical properties and strain hardening behavior of aluminum matrix composites reinforced with few-walled carbon nanotubes

B. Chen, Z. Li, J. Shen, S. Li, L. Jia, J. Umeda, K. Kondoh, J. S. Li

Journal of Alloys and Compounds　Vol. 826　2020/01　Research paper (scientific journal)

High-Brightness and High-Power Laser Welding of Powder Metallurgy Shape Memory Alloy: Welding-Parameter-Dependent Microstructure

Abdollah Bahador, Junko Umeda, Masami Mizutani, Esah Hamzah, Farazila Yusof, Katsuyoshi Kondoh

Journal of Materials Engineering and Performance　2020/01　Research paper (scientific journal)

Synergistic strengthening mechanisms of copper matrix composites with TiO2 nanoparticles

Abdollah Bahador, Junko Umeda, Esah Hamzah, Farazila Yusof, Xiaochun Li, Katsuyoshi Kondoh

Materials Science and Engineering: A　2019/12　Research paper (scientific journal)

Asymmetric local strain, microstructure and superelasticity of friction stir welded Nitinol alloy

Abdollah Bahador, Junko Umeda, Seiichiro Tsutsumi, Esah Hamzah, Farazila Yusof, Hidetoshi Fujii, Katsuyoshi Kondoh

Materials Science and Engineering: A　Vol. 767　2019/09　Research paper (scientific journal)

Interfacial reaction behavior and mechanical properties of pure aluminum and magnesium alloy dissimilar materials fabricated by hot press and heat treatment

Junko Umeda, Katsuyoshi Kondoh, Hiroyuki Sannomiya, Tachai Luangvaranunt, Makoto Takahashi, Hiroshi Nishikawa

Materials Characterization　Vol. 157　2019/08　Research paper (scientific journal)

Strengthening Mechanisms of Powder Metallurgy Extruded CP Titanium Materials with Zirconium and Oxygen Solid Solution via Decomposition of ZrO2 Additives in Sintering

Mizuki Fukuo, Shota Kariya, Junko Umeda, Katsuyoshi Kondoh, Masato Yoshiya

Materials Transactions　Vol. 60　No. 9　p. 1881-1889　2019/07　Research paper (scientific journal)

Phase Transformation Control of Powder Metallurgy Super-Elastic Ti-Ni Alloy by Adding Co Element

Tomoki Eda, Anak Khantachawana, Junko Umeda, Katsuyoshi Kondoh

Materials Transactions　Vol. 60　No. 8　p. 1583-1590　2019/06　Research paper (scientific journal)

Interfacial in-situ Al2O3 nanoparticles enhance load transfer in carbon nanotube (CNT)-reinforced aluminum matrix composites

B. Chen, K. Kondoh, J. Umeda, S. Li, L. Jia, J. Li

Journal of Alloys and Compounds　Vol. 789　p. 25-29　2019/06　Research paper (scientific journal)

Characteristics of Titanium Powder with Nitrogen and Mechanical Properties of Its Additive Manufactured Materials

Ammarueda ISSARIYAPAT, Katsuyoshi KONDOH, Patama VISUTTIPITUKUL, Tingting SONG, Ma QIAN, Junko UMEDA

Journal of Smart Processing　Vol. 8　No. 3　p. 95-101　2019/05

Tailoring Microstructure and Properties of a Superelastic Ti-Ta Alloy by Incorporating Spark Plasma Sintering with Thermomechanical Processing Journal of Materials Engineering and Performance

Abdollah Bahador, Shota Kariya, Junko Umeda, Esah Hamzah, Katsuyoshi Kondoh

Journal of Materials Engineering and Performance　Vol. 28　No. 5　p. 3012-3020　2019/04　Research paper (scientific journal)

Hybrid effect of TiCp and TiBw co-strengthening Ti matrix composites prepared by spark plasma sintering and hot extrusion

Lei Jia, Xiao Li, Katsuyoshi Kondoh, Biao Chen, Shufeng Li, Junko Umeda, Zhenlin Lu

Materials Characterization　Vol. 151　p. 6-14　2019/03　Research paper (scientific journal)

Quantitative Analysis on Light Elements Solution Strengthening in Pure Titanium Sintered Materials by Labusch Model Using Experimental Data

Shota Kariya, Mizuki Fukuo, Junko Umeda, Katsuyoshi Kondoh

Materials Transactions　Vol. 60　No. 2　p. 263-268　2019/02　Research paper (scientific journal)

Phase Transformation Control of Powder Metallurgy Super-elastic Ti-Ni Alloy by Adding Co Element

Tomoki Eda, Anak Khantachawana, Junko Umeda, Katsuyoshi Kondoh

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 66　No. 1　p. 9-16　2019/01　Research paper (scientific journal)

Rate sensitivity and work-hardening behavior of an advanced Ti-Al-N alloy under uniaxial tensile loading

J. Shen, J. Umeda, B. Chen, J. Zhang, Y.Li, K. Kondoh

Materials Science & Engineering A　Vol. 744　No. 28　p. 630-637　2019/01　Research paper (scientific journal)

Microstructural and mechanical properties of α-titanium sintered material via thermal decomposition of additive chromium oxide particles

Kondoh Katsuyoshi, Ikemasu Ryuho, Umeda Junko, Kariya Shota, Anak Khantachawana

Materials Science and Engineering: A　Vol. 739　No. 2　p. 491-498　2019/01　Research paper (scientific journal)

Electrochemical Properties of Fe Solid-Solution Strengthened Sintered Titanium

Syogo Takeuchi, Masahiko Hatakeyama, Masato Yoshiya, Syota Kariya, Junko Umeda, Katsuyoshi Kondoh, Satoshi Sunada

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 65　No. 12　p. 761-765　2018/12　Research paper (scientific journal)

Strengthening Mechanisms of Powder Metallurgy Extruded CP Titanium Materials with Zirconium and Oxygen Solid Solution via Decomposition of ZrO2 Additives in Sintering

Fukuo Mizuki, Shota Kariya, Junko Umeda, Katsuyoshi Kondoh, Masato Yoshiya

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 65　No. 12　p. 746-755　2018/12　Research paper (scientific journal)

Low pressure spark plasma sintered hydroxyapatite and Bioglass composite scaffolds for bone tissue repair

M. Rizwan, M. Hamdi, W.J. Basirun, K. Kondoh, J. Umeda

Ceramics International　Vol. 44　No. 18　p. 23052-23062　2018/12　Research paper (scientific journal)

Ductility Improvement Mechanism of Ti-6Al-4V + O Sintered Material

Kento Kamiyama, Shota Kariya, Mizuki Fukuo, Junko Umeda, Katsuyoshi Kondoh

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 65　No. 11　p. 699-706　2018/11　Research paper (scientific journal)

Effect of Shape Memory Heat Treatment on Microstructures and Mechanical Properties of Powder Metallurgy TiNi Shape Memory Alloy

Ryoichi Soba, Yukiko Tanabe, Takayuki Yonezawa, Junko Umeda, Katsuyoshi Kondoh

Materials Transactions　Vol. 59　No. 5　p. 805-810　2018/10　Research paper (scientific journal)

Ductility Improvement Mechanism of Pure Titanium with Excessive Oxygen Solid Solution via Rapid Cooling Process

Shota Kariya, Junko Umeda, Qian Ma, Katsuyoshi Kondoh

J.Japan Inst.Met.Mater.　Vol. 82　No. 10　p. 390-395　2018/08　Research paper (scientific journal)

純チタン焼結材における軽元素固溶強化に関する実験データを用いたLabuschモデルによる定量解析

刈屋 翔太, 福生 瑞希, 梅田 純子, 近藤 勝義

粉体および粉末冶金　Vol. 65　No. 7　2018/04　Research paper (scientific journal)

Heat-Conduction-Type and Keyhole-Type Laser Welding of Ti-Ni Shape-Memory Alloys Processed by Spark-Plasma Sintering

Abdollah Bahador, Esah Hamzah, Katsuyoshi Kondoh, Seiichiro Tsutsumi, Junko Umeda, Tuty Asma Abu Bakar, Farazila Yusof

MATERIALS TRANSACTIONS　Vol. 59　No. 5　p. 835-842　2018/04　Research paper (scientific journal)

Preparation of Si and O co-solution strengthened Ti alloys by using rice husks as SiO2 resource and quantitative descriptions on their strengthening effects

Lei Jia, Jiang-xian Chen, Zhen-lin Lu, Shu-feng Li, Junko Umeda, Katsuyoshi Kondoh

Materials Research Express　Vol. 5　No. 4　2018/04　Research paper (scientific journal)

Study on Aluminum Matrix Composites Reinforced with Singly Dispersed Carbon Nanotubes

Biao Chen, Junko Umeda, Katsuyoshi Kondoh

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 65　No. 3　p. 139-144　2018/03　Research paper (scientific journal)

Advanced Mechanical Properties of a Powder Metallurgy Ti-Al-N Alloy Doped with Ultrahigh Nitrogen Concentration

J. Shen, B. Chen, J. Umeda, K. Kondoh

JOM　p. 1-6　2018/03　Research paper (scientific journal)

Evaluation of tissue behavior on three-dimensional collagen scaffold coated with carbon nanotubes and β-tricalcium phosphate nanoparticles

H Miyaji, S Murakami, E Nishida, T Akasaka, B Fugetsu, J Umeda, K Kondoh, T Iizuka, T Sugaya

J Oral Tissue Engin　Vol. 15　No. 3　p. 123-130　2018/03　Research paper (scientific journal)

Comparison Study on Additive Manufacturing (AM) and Powder Metallurgy (PM) AlSi10Mg Alloys

B. Chen, S. K. Moon, X. Yao, G.Bi, J. Shen, J. Umeda, K. Kondoh

JOM　p. 1-6　2018/02　Research paper (scientific journal)

Effect of Shape Memory Heat Treatment on Microstructures and Mechanical Properties of Powder Metallurgy TiNi Shape Memory Alloy

Ryoichi Soba, Yukiko Tanabe, Takayuki Yonezawa, Junko Umeda, Katsuyoshi Kondoh

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 65　No. 2　p. 85-90　2018/02　Research paper (scientific journal)

Microstructure and mechanical properties of CP-Ti fabricated via powder metallurgy with non-uniformly dispersed impurity solutes

J. Shen, B. Chen, J. Umeda, K. Kondoh

Materials Science and Engineering A　Vol. 716　p. 1-10　2018/02　Research paper (scientific journal)

Tensile fracture of tib whisker reinforced ti alloy matrix composites

Hiroki Kurita, Katsuyoshi Kondoh, Junko Umeda, Noriharu Yodoshi

Materials Science Forum　Vol. 941 MSF　p. 1961-1965　2018　Research paper (international conference proceedings)

C-O bond enhancing direct bonding strength between plastic and pure titanium

Katsuyoshi Kondoh, Junko Umeda

Materials Letters　Vol. 211　p. 331-334　2018/01　Research paper (scientific journal)

Strength and strain hardening of a selective laser melted AlSi10Mg alloy

B. Chen, S. K. Moon, X. Yao, G. Bi, J. Shen, J. Umeda, K. Kondoh

SCRIPTA MATERIALIA　Vol. 141　p. 45-49　2017/12　Research paper (scientific journal)

Tribological Property of α- Pure Titanium Strengthened by Nitrogen Solid-Solution

Yasuhiro Yamabe, Junko Umeda, Hisashi Imai, Katsuyoshi Kondoh

MATERIALS TRANSACTIONS　Vol. 59　No. 1　p. 61-65　2017/12　Research paper (scientific journal)

Microstructures and Mechanical Properties of Shape Memory Alloy Using Pre-Mixed TiNi Powders with TiO2 Particles

Ryoichi Soba, Yukiko Tanabe, Takayuki Yonezawa, Junko Umeda, Katsuyoshi Kondoh

Materials Transactions　Vol. 59　No. 1　p. 117-122　2017/12　Research paper (scientific journal)

Length effect of carbon nanotubes on the strengthening mechanisms in metal matrix composites

B. Chen, J. Shen, X. Ye, L. Jia, S. Li, J. Umeda, M. Takahashi, K. Kondoh

ACTA MATERIALIA　Vol. 140　p. 317-325　2017/11　Research paper (scientific journal)

TiO2粒子添加TiNi混合素粉末焼結材の組織構造と力学特性

早場 亮一, 田邊 由紀子, 米澤 隆行, 梅田 純子, 近藤 勝義

粉体および粉末冶金　Vol. 64　No. 11　p. 589-594　2017/11　Research paper (scientific journal)

Mechanical and superelastic properties of laser welded Ti-Ni shape-memory alloys produced by powder metallurgy

Abdollah Bahador, Esah Hamzah, Katsuyoshi Kondoh, Yousuke Kawahito, Umeda Junko, Tuty Asma Abu Bakar

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY　Vol. 248　p. 198-206　2017/10　Research paper (scientific journal)

Advanced mechanical properties of powder metallurgy commercially pure titanium with a high oxygen concentration

Biao Chen, Jianghua Shen, Xiaoxin Ye, Junko Umeda, Katsuyoshi Kondoh

JOURNAL OF MATERIALS RESEARCH　Vol. 32　No. 19　p. 3769-3776　2017/10　Research paper (scientific journal)

Powder Forming Process from Machined Titanium Chips via Heat Treatment in Hydrogen Atmosphere

Junko Umeda, Takanori Mimoto, Hisashi Imai, Katsuyoshi Kondoh

Materials Transactions　Vol. 52　No. 12　p. 1702-1707　2017/10　Research paper (scientific journal)

酸化物分散マグネシウム複合焼結材の高温での強化機構解明

藤田 淳司, 梅田 純子, 近藤 勝義

粉体および粉末冶金　Vol. 64　No. 9　p. 479-485　2017/09　Research paper (scientific journal)

Synthesis of Al2Ca Dispersoids by Powder Metallurgy Using a Mg-Al Alloy and CaO Particles

Junji Fujita, Junko Umeda, Katsuyoshi Kondoh

MATERIALS　Vol. 10　No. 7　2017/07　Research paper (scientific journal)

酸化物粒子の熱分解を利用したチタン焼結材の結晶粒微細化と高強度化（第２報）

近藤 勝義, 池増 竜帆, 梅田 純子, 刈屋 翔太, ANAK Khantachawana

チタン　Vol. 65　No. 3　p. 114-119　2017/07　Research paper (scientific journal)

バイオシリカのコンクリート混和材としての利用に関する研究

森脇 慶幸, 周藤 将司, 梅田 純子, 道浦 吉貞

コンクリート工学年次論文　Vol. 37　No. 1　p. 145-150　2017/07　Research paper (scientific journal)

Microstructure and strengthening mechanism of ultrastrong and ductile Ti-xSn alloy processed by powder metallurgy

X. X. Ye, B. Chen, J. H. Shen, J. Umeda, K. Kondoh

JOURNAL OF ALLOYS AND COMPOUNDS　Vol. 709　p. 381-393　2017/06　Research paper (scientific journal)

In Situ Decomposition of Silicon Nitride Particles in Titanium Composite and its Mechanical Properties

Hisashi IMAI, Hiroyasu YAMABE, Katsuyoshi KONDOH, Junko UMEDA, Anak KHANTACHAWANA

Key Engineering Materials　Vol. 737　p. 38-43　2017/06　Research paper (scientific journal)

窒素固溶強化純チタン焼結材の摩擦摺動特性

山辺 康宏, 梅田 純子, 今井 久志, 近藤 勝義

粉体および粉末冶金　Vol. 64　No. 6　p. 275-280　2017/06　Research paper (scientific journal)

Effect of Spark-Plasma-Sintering Conditions on Tensile Properties of Aluminum Matrix Composites Reinforced with Multiwalled Carbon Nanotubes (MWCNTs)

B. Chen, H. Imai, J. Umeda, M. Takahashi, K. Kondoh

JOM　Vol. 69　No. 4　p. 669-675　2017/04　Research paper (scientific journal)

Solid-state interfacial reaction and load transfer efficiency in carbon nanotubes (CNTs)-reinforced aluminum matrix composites

B. Chen, J. Shen, X. Ye, H. Imai, J. Umeda, M. Takahashi, K. Kondoh

CARBON　Vol. 114　p. 198-208　2017/04　Research paper (scientific journal)

Highly Thermally Stable Microstructure in Mg Fabricated Via Powder Rolling

J. Shen, H. Imai, B. Chen, X. Ye, J. Umeda, K. Kondoh

JOM　Vol. 69　No. 4　p. 657-662　2017/04　Research paper (scientific journal)

酸化物粒子の熱分解を利用したチタン焼結材の結晶粒微細化と高強度化（第１報）

近藤勝義, 池増竜帆, 梅田純子, 刈屋翔太, ANAK Khantachawana

チタン　Vol. 65　No. 2　p. 130-137　2017/04　Research paper (scientific journal)

Strengthening-toughening mechanism study of powder metallurgy Ti-Si alloy by interrupted in-situ tensile tests

X. X. Ye, H. Imai, J. H. Shen, B. Chen, G. Q. Han, J. Umeda, M. Takahashi, K. Kondoh

JOURNAL OF ALLOYS AND COMPOUNDS　Vol. 694　p. 82-92　2017/02　Research paper (scientific journal)

The formation of bimodal multilayered grain structure and its effect on the mechanical properties of powder metallurgy pure titanium

J. Shen, B. Chen, X. Ye, H. Imai, J. Umeda, K. Kondoh

MATERIALS & DESIGN　Vol. 116　p. 99-108　2017/02　Research paper (scientific journal)

Dynamic recrystallization behavior and strengthening-toughening effects in a near-alpha Ti-xSi alloy processed by hot extrusion

X. X. Ye, H. Imai, J. H. Shen, B. Chen, G. Q. Han, J. Umeda, M. Takahashi, K. Kondoh

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 684　p. 165-177　2017/01　Research paper (scientific journal)

Study of twinning behavior of powder metallurgy Ti-Si alloy by interrupted in-situ tensile tests

X. X. Ye, H. Imai, J. H. Shen, B. Chen, G. Q. Han, J. Umeda, K. Kondoh

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 679　p. 543-553　2017/01　Research paper (scientific journal)

水素熱処理を利用したチタン切削屑の粉体化プロセス

梅田 純子, 三本 嵩哲, 今井 久志, 近藤 勝義

粉体および粉末冶金　Vol. 63　No. 12　p. 1002-1008　2016/12　Research paper (scientific journal)

カーボンナノチューブ分散純銅基複合材料の組織変化と力学特性

今井 久志, 近藤 勝義, 梅田 純子

粉体および粉末冶金　Vol. 63　No. 12　p. 1015-1020　2016/12　Research paper (scientific journal)

焼成籾殻中の脆性炭化物を利用した非晶質シリカ微粒子の生成プロセス

梅田 純子, 藤井 寛子, 近藤 勝義

スマートプロセス学会誌　Vol. 5　No. 6　p. 365-372　2016/11　Research paper (scientific journal)

Bonding mechanism of Ti/AZ80 dissimilar materials fabricated by spark plasma sintering

Patchara Pripanapong, Junko Umeda, Hisashi Imai, Makoto Takahashi, Katsuyoshi Kondoh

Journal of Multidisciplinary Engineering Science Studies (JMESS)　Vol. 2　No. 10　p. 1009-1013　2016/10　Research paper (scientific journal)

Investigation of High-strength Lead-free Machinable Cu40Zn Duplex Graphite Brasses by Powder Metallurgy

S. Li, H. Imai, J. Umeda, Y. Fu, K. Kondoh

Materials Science and Technology　Vol. 32　No. 17　p. 1-6　2016/10　Research paper (scientific journal)

Effect of Reaction between Alloying Element and VGCFs on Mechanical and Electrical Properties of PM Copper Alloy Composites Dispersed with VGCFs

H. Imai, K.Y. Chen, K. Kondoh, J. Umeda, H.Y. Tsai

Materials Transactions　Vol. 57　No. 10　p. 1784-1788　2016/08　Research paper (scientific journal)

Tribological behavior of powder metallurgy Ti composites reinforced with multi-wall carbon

Thotsaphon Threrujirapapong, Katsuyoshi Kondoh, Junko Umeda

Journal of Multidisciplinary Engineering Science Studies (JMESS)　Vol. 2　No. 8　p. 822-826　2016/08　Research paper (scientific journal)

Anisotropy of texture-controlled powder metallurgy magnesium alloys via rollcompaction process

Katsuyoshi Kondoh, Takamichi Oguri, Junko Umeda, Hisashi Imai

Journal of Multidisciplinary Engineering Science Studies (JMESS)　Vol. 2　No. 8　p. 810-814　2016/08　Research paper (scientific journal)

Corrosion behavior and strength of dissimilar bonding material between Ti and Mg alloys by spark plasma sintering

Patchara Pripanapong, Shota Kariya, Tachai Luangvaranunt, Junko Umeda, Seiichiro Tsutsumi, Makoto Takahashi, Katsuyoshi Kondoh

Materials　Vol. 9　2016/08　Research paper (scientific journal)

Surface potential analysis on initial galvanic corrosion of Ti/Mg-Al dissimilar material

Junko Umeda, Nozomi Nakanishi, Katsuyoshi Kondoh, Hisashi Imai

Materials Chemistry and Physics　Vol. 179　p. 5-9　2016/08　Research paper (scientific journal)

Effect of Textures on Tensile Properties of Extruded Ti64/VGCF Composite by Powder Metallurgy Route

Patchara Pripanapong, Shu-feng Li, Junko Umeda, Katsuyoshi Kondoh

Mechanics, Materials Science & Engineering Journal　Vol. 5　No. 1　2016/07　Research paper (scientific journal)

Tensile Strength of Ti/Mg Alloys Dissimilar Bonding Material Fabricated by Spark Plasma Sintering

Patchara Pripanapong, Junko Umeda, Hisashi Imai, Makoto Takahashi, Katsuyoshi Kondoh

International Journal of Engineering Innovation & Research　Vol. 5　No. 4　p. 253-259　2016/07　Research paper (scientific journal)

Strengthening behaviour and mechanisms of extruded powder metallurgy pure Ti materials reinforced with ubiquitous light elements

T. Mimoto, J. Umeda, K. Kondoh

Powder Metallurgy　Vol. 59　No. 3　p. 223-228　2016/06　Research paper (scientific journal)

Effect of initial state on dispersion evolution of carbon nanotubes in aluminium matrix composites during a high-energy ball milling process

B. Chen, K. Kondoh, H. Imai, J. Umeda

Powder Metallurgy　Vol. 59　No. 3　p. 216-222　2016/06　Research paper (scientific journal)

Effect of Reaction between Alloying Element and VGCFs on Mechanical and Electrical Properties of PM Copper Alloy Composites Dispersed with VGCFs

H. Imai, K.-Y. Chen, K. Kondoh, J. Umeda, H.-Y. Tsai

J. Jpn. Soc. Powder Powder Metallurgy　Vol. 63　No. 4　p. 150-156　2016/04　Research paper (scientific journal)

Corrosion Resistant Evaluation of Oxygen Solid-Solution Strengthened Pure Titanium

Satoshi Sunada, Akihiko Takagi, Masahiko Hatakeyama, Junko Umeda, Li Shufeng, Katsuyoshi Kondoh

Chiang Mai Journal of Science　Vol. 43　p. 381-392　2016/03　Research paper (scientific journal)

Simultaneously enhancing strength and ductility of carbon nanotube/aluminum composites by improving bonding conditions

Biao Chen, Katsuyoshi Kondoh, Hisashi Imai, Junko Umeda, Makoto Takahashi

Scripta Materialia　Vol. 113　p. 158-162　2016/03　Research paper (scientific journal)

Deformation mechanisms of pure Mg materials fabricated by using pre-rolled powders

J. Shen, H. Imai, B. Chen, X. Ye, J. Umeda, K. Kondoh

Materials Science and Engineering A　Vol. 658　p. 309-320　2016/02　Research paper (scientific journal)

Strengthening behavior of in situ-synthesized (TiC-TiB)/Ti composites by powder metallurgy and hot extrusion

Shufeng Li, Katsuyoshi Kondoh, Hisashi Imai, Biao Chen, Lei Jia, Junko Umeda, Yabo Fu

Materials and Design　Vol. 95　p. 127-132　2016/01　Research paper (scientific journal)

Effect of vapor grown carbon fiber content on microstructure and tensile properties of Ti64/TiC composite fabricated by powder metallurgy method

Patchara Pripanapong, Takanori Mimoto, Junko Umeda, Hisashi Imai, Katsuyoshi Kondoh

Journal of Composite Materials　Vol. 50　No. 24　p. 3405-3414　2015/12　Research paper (scientific journal)

Carbon nanotube induced microstructural characteristics in powder metallurgy Al matrix composites and their effects on mechanical and conductive properties

B. Chen, S. Li, H. Imai, L. Jia, J. Umeda, M. Takahashi, K. Kondoh

Journal of Alloys and Compounds　Vol. 658　p. 608-615　2015/08　Research paper (scientific journal)

Titanium Powders via Gas-Solid Direct Reaction Process and Mechanical Properties of Their Extruded Materials

Takanori Mimoto, Junko Umeda, Katsuyoshi Kondoh

Materials Transactions　Vol. 56　No. 8　p. 1153-1158　2015/07　Research paper (scientific journal)

Effect of Chromium Behavior on Mechanical and Electrical Properties of P/M Copper-Chromium Alloy Dispersed with VGCF

Hisashi Imai, Kuan-Yu Chen, Katsuyoshi Kondoh, Hung-Yin Tsai, Junko Umeda

International Journal of Chemical, Nuclear, Materials and Metallurgical Engineering　Vol. 9　No. 7　p. 898-901　2015/07　Research paper (scientific journal)

Interfacial Structure Analysis on Direct Bonding Metals to Plastics

IMAI Hisashi, KONDOH Katsuyoshi, IZAWA Takeru, UMEDA Junko

Trans. JWRI　Vol. 44　No. 1　p. 23-26　2015/06　Research paper (bulletin of university, research institution)

Biological response to nanostructure of carbon nanotube/titanium composite surfaces

E Nishida, H Miyaji, J Umeda, K Kondoh, H Takita, I Kanayama, S Tanaka, A Kato, B Fugetsu, T Akasaka, M Kawanami

Nano Biomed　Vol. 7　p. 11-20　2015/06

Load transfer strengthening in carbon nanotubes reinforced metal matrix composites via in-situ tensile tests

Biao Chen, Shufeng Li, Hisashi Imai, Lei Jia, Junko Umeda, Makoto Takahashi, Katsuyoshi Kondoh

Composites Science and Technology　Vol. 113　p. 1-8　2015/03　Research paper (scientific journal)

Microstructure and mechanical properties of P/M titanium matrix composites reinforced by in-situ synthesized TiC-TiB

Shufeng Li, Katsuyoshi Kondoh, Hisashi Imai, Biao Chen, Lei Jia, Junko Umeda

Materials Science & Engineering A　Vol. 628　p. 75-83　2015/03　Research paper (scientific journal)

An Approach for Homogeneous Carbon Nanotube Dispersion in Al Matrix Composites

Biao Chen, Shufeng Li, Hisashi Imai, Lei Jia, Junko Umeda, Makoto Takahashi, Katsuyoshi Kondoh

Materials & Design　Vol. 72　p. 1-8　2015/02　Research paper (scientific journal)

Inter-Wall Bridging Induced Peeling of Multi-Walled Carbon Nanotubes during Tensile Failure in Aluminum Matrix Composites

Biao Chen, Shufeng Li, Hisashi Imai, Junko Umeda, Makoto Takahashi, Katsuyoshi Kondoh

Micron　Vol. 69　p. 1-5　2015/02　Research paper (scientific journal)

Mechanical Properties and Corrosion Behavior of Fe/SiC Dispersed P/M Mg Alloy

Shota KARIYA, Junko UMEDA, Hisashi IMAI, Haruo UNOSAWA, Manuel MARYA, Katsuyoshi KONDOH

Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 62　No. 9　p. 462-467　2015　Research paper (scientific journal)

Friction behavior of network-structured CNT coating on pure titanium plate

J Umeda, B Fugetsu, E Nishida, H Miyaji, K Kondoh

Appl Surf Sci　Vol. 357　p. 721-727　2015　Research paper (scientific journal)

Materials design for corrosion rate control in PM AZ91 Mg alloy by Fe addition

KARIYA Shota, JUNKO Umeda, IMAI Hisashi, KONDOH Katsuyoshi, HARUO Unosawa, MANUEL Marya

Trans. JWRI　Vol. 43　No. 2　p. 31-36　2014/12　Research paper (bulletin of university, research institution)

Crack Formation in Powder Metallurgy Carbon Nanotube(CNT)/Al Composites During Post Heat-Treatment

Biao Chen, Hisashi Imai, Shufen Li, Lei Jia, Junko Umeda, Katsuyoshi Kondoh

JOM　Vol. 67　No. 12　p. 2887-2891　2014/12　Research paper (scientific journal)

Advanced Powder Metallurgy Non-Ferrous Materials -PM Ti-Ni Shape Memory Alloy with High Strength and Excellent Shape Recovery Rate-

Katsuyoshi KONDOH, Takayuki YONEZAWA, Junko UMEDA, Hisashi IMAI, Ryoichi SOUBA

J. Jpn. Soc. Powder Powder Metallurgy　Vol. 61　No. 11　p. 501-513　2014/11　Research paper (scientific journal)

High-Purity Amorphous Silica Originated in Rice Husks of Agricultural Waste and Utilization of Concrete Admixture

Junko UMEDA, Ryuichi TAKADA, Yoshisada MICHIURA, Katsuyoshi KONDOH

Journal of Smart Processing　Vol. 3　No. 5　p. 317-321　2014/09　Research paper (scientific journal)

Experimental and Theoretical Analysis of Nitrogen Solid-Solution Strengthening of PM Titanium

Katsuyoshi Kondoh, Bin Sun, Shufeng Li, Hisashi Imai, Junko Umeda

International Journal of Powder Metallurgy　Vol. 50　No. 3　p. 35-40　2014/09　Research paper (scientific journal)

Peeling of Carbon Nanotubes during Tensile Failure in Al Matrix Composites

Chen Biao, LI Shufeng, Imai Hisashi, JIA Lei, Umeda Junko, Takahashi Makoto, Kondoh Katsuyoshi

Trans. JWRI　Vol. 43　No. 1　p. 29-32　2014/06　Research paper (bulletin of university, research institution)

Fracturing behavior of direct bonded Ti with Mg alloys by Solid state bonding

Pripanapong Patchara, Takahashi Makoto, Umeda Junko, Kondoh Katsuyoshi

Trans. JWRI　Vol. 43　No. 1　p. 25-28　2014/06　Research paper (bulletin of university, research institution)

Microstructural and mechanical behavior of multi-walled carbon nanotubes reinforced Al-Mg-Si alloy composites in aging treatment

Katsuyoshi Kondoh, Hiroyuki Fukuda, Junko Umeda, Hisashi Imai, Bunshi Fugetsu

CARBON　Vol. 72　p. 15-21　2014/06　Research paper (scientific journal)

Microstructural and Electrical Properties of Copper-Titanium Alloy Dispersed with Carbon Nanotubes via Powder Metallurgy Process

Hisashi Imai, Katsuyoshi Kondoh, Shufeng Li, Junko Umeda, Bunshi Fugetsu, Makoto Takahashi

MATERIALS TRANSACTIONS　Vol. 55　No. 3　p. 522-527　2014/03　Research paper (scientific journal)

Microstructure and Mechanical Properties of Cu-40 %Zn-0.5 %Cr Alloy by Powder Metallurgy

Hisashi Imai, Shufeng Li, Katsuyoshi Kondoh, Yoshiharu Kosaka, Takuya Okada, Koji Yamamoto, Motoi Takahashi, Junko Umeda

MATERIALS TRANSACTIONS　Vol. 55　No. 3　p. 528-533　2014/03　Research paper (scientific journal)

Microstructures and Mechanical Properties of Sintered and Extruded TiNi Shape-Memory Alloys Using Prealloyed Powder with Additions of TiO2 Powder

T. Yonezawa, T. Yoshimura, J. Umeda, K. Kondoh, R. Souba

International Journal of Powder Metallurgy　Vol. 50　No. 1　p. 33-39　2014/01　Research paper (scientific journal)

Microstructure and Strengthening Mechanism of Ni-rich TiNi Shape Memory Alloys via Powder Metallurgy Process

Takayuki YONEZAWA, Hisashi IMAI, Junko UMEDA, Katsuyoshi KONDOH, Ryoichi SOUBA

Transactions of the Japan Society of Mechanical Engineers Series A　Vol. 79　No. 808　p. 1695-1704　2013/12　Research paper (scientific journal)

Investigation of Powder Metallurgy Titanium Matrix Composites by Planetary Ball-milling of Ti Powder Dispersed with Vapour Grown Carbon Nanofibers

S. Li, K. Kondoh, B. Sun, H. Imai, J. Umeda

Proceedings of Materials Science & Technology 2013 (MS&T'13)　p. 3009-3016　2013/10　Research paper (international conference proceedings)

Effect of Titanium Addition on Mechanical and Electrical Properties of P/M Copper-Titanium Alloy Dispersed with Vapor-grown Carbon Fiber

H. Imai, K. Kondoh, S. Li, J. Umeda

Proceedings of Materials Science & Technology 2013 (MS&T'13)　p. 1745-1750　2013/10　Research paper (international conference proceedings)

Pure Titanium with High Strength and Excellent Ductility by Solid Solute Oxygen Strengthening via Powder Metallurgy Route

K. Kondoh, S. Li, S. Bin, T. Mimoto, H. Imai, J. Umeda

Proceedings of Materials Science & Technology 2013 (MS&T'13)　p. 3004-3008　2013/10　Research paper (international conference proceedings)

水素によるチタン焼結押出材の高強度発現機構

三本 嵩哲, 李 樹豊, 梅田 純子, 近藤 勝義

粉体および粉末冶金　Vol. 60　No. 11　p. 467-474　2013/09　Research paper (scientific journal)

Quantitative evaluation of initial galvanic corrosion behavior of CNTs reinforced Mg-Al alloy

Keisuke Funatsu, Hiroyuki Fukuda, Rei Takei, Junko Umeda, Karsuyoshi Kondoh

ADVANCED POWDER TECHNOLOGY　Vol. 24　No. 5　p. 833-837　2013/09　Research paper (scientific journal)

Improvement in Tensile Property of Ti64 Composites with VGCFs Fabricated by Powder Metallurgy

PRIPANAPONG Patchara, MIMOTO Takanori, LI Shu-feng, IMAI Hisashi, UMEDA Junko, KONDOH Katsuyoshi

Trans. JWRI　Vol. 42　No. 1　p. 27-31　2013/06　Research paper (bulletin of university, research institution)

Fabrication of high-strength Ti materials by in-process solid solution strengthening of oxygen via P/M methods

Bin Sun, Shufeng Li, Hisashi Imai, Takanori Mimoto, Junko Umeda, Katsuyoshi Kondoh

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 563　p. 95-100　2013/02　Research paper (scientific journal)

The Development of a Ti-6Al-4V Alloy via Oxygen Solid Solution Strengthening for Aerospace & Defense Applications

Tyrone L. Jones, Katsuyoshi Kondoh, Takanori Mimoto, Nozomi Nakanishi, Junko Umeda

COST-AFFORDABLE TITANIUM IV　Vol. 551　p. 118-+　2013　Research paper (international conference proceedings)

Tribological Properties of Titanium Plate Coated with Carbon Nanotubes

Junko Umeda, Takanori Mimoto, Katsuyoshi Kondoh, Bunshi Fugetsu

MATERIALS SCIENCE AND TECHNOLOGY VII　Vol. 545　p. 158-+　2013　Research paper (international conference proceedings)

Strengthening Mechanism of TiNi Shape Memory Sintered Alloy using Elemental Mixtures of Pre-alloyed TiNi Powder and TiO2 Particles

YONEZAWA Takayuki, YOSHIMURA Tomohiro, UMEDA Junko, KONDOH Katsuyoshi, SOUBA Ryouichi

Trans. JWRI　Vol. 41　No. 2　p. 55-59　2012/12　Research paper (bulletin of university, research institution)

Surface Characteristic and Corrosion Phenomena of X-ray Irradiated Pure Mg

FUNATSU Keisuke, SUZUKI Masashi, TAKAHASHI Makoto, IMAI Hisashi, UMEDA Junko, AKAMATSU Fumiteru, KONDOH Katsuyoshi

Trans. JWRI　Vol. 41　No. 2　p. 13-18　2012/12　Research paper (bulletin of university, research institution)

Cu-40%Zn-0.5%Cr粉末合金の組織および機械的性質に及ぼすCrの挙動

今井 久志, 李 樹豊, 近藤 勝義, 上坂 美治, 岡田 拓也, 山本 浩士, 高橋 基, 梅田 純子

粉体および粉末冶金　Vol. 59　No. 11　p. 645-651　2012/11　Research paper (scientific journal)

TiO2粒子を添加した高強度TiNi形状記憶粉末合金の組織構造と力学特性

米澤 隆行, 吉村 知浩, 梅田 純子, 近藤 勝義, 早場 亮

スマートプロセス学会誌　Vol. 1　No. 6　p. 288-292　2012/10　Research paper (scientific journal)

酸素固溶強化による高強度チタン粉末焼結材の創製

孫 斌, 李 樹豊, 今井 久志, 三本 嵩哲, 梅田 純子, 近藤 勝義

スマートプロセス学会誌　Vol. 1　No. 6　p. 283-287　2012/10　Research paper (scientific journal)

X線照射による励起場形成を利用した純マグネシウムの表面改質現象

船津 恵介, 梅田 純子, 高橋 誠, 近藤 勝義

スマートプロセス学会誌　Vol. 1　No. 6　p. 293-297　2012/10　Research paper (scientific journal)

粉末冶金法を用いたカーボンナノチューブ分散Cu-Ti合金の組織と機械的および電気的特性

今井 久志, 近藤 勝義, 李 樹豊, 梅田 純子, 古月 文志, 高橋 誠

粉体および粉末冶金　Vol. 59　No. 10　p. 609-615　2012/10　Research paper (scientific journal)

Carbon Nanotubes Reinforced Titanium Powder Composite Materials

K. Kondoh, T. Threrujirapapong, S. Li, B. Sun, H. Imai, J. Umeda, B. Fugetsu

Proceedings of Powder Metallurgy World Congress & Exhibition (PM2012)　2012/10　Research paper (international conference proceedings)

The Next-Generation Development of a Superior Grade Titanium Ti-6Al-4V Alloy via Oxygen Solid Solution Strengthening for Aerospace & Defense Applications

K. Kondoh, T. Mimoto, N. Nakanishi, J. Umeda, T. Jones

Proceedings of Titanium 2012　2012/10　Research paper (international conference proceedings)

Mechanical and electrical properties of P/M copper-titanium alloy dispersed with carbon nanotubes

H. Imai, K. Kondoh, S. Li, J. Umeda

Proceedings of Materials Science & Technology 2012 (MS&T 2012)　p. 818-825　2012/10　Research paper (international conference proceedings)

Influence of Surface Potential Difference at Microscopic Interface on Initial Galvanic Corrosion Phenomena of Magnesium Alloy

Keisuke Funatsu, Rei Takei, Junko Umeda, Katsuyoshi Kondoh

Trans. Jpn. Soc. Mech. Eng. -Part A　Vol. 78　No. 794　p. 1432-1445　2012/09　Research paper (scientific journal)

Oxygen Solid Solution Strengthened Pure Titanium Powder Materials

SUN Bin, LI Shufeng, IMAI Hisashi, UMEDA Junko, KONDOH Katsuyoshi

Trans. JWRI　Vol. 41　No. 1　p. 59-64　2012/06　Research paper (bulletin of university, research institution)

Wear Behavior of Network-Structured Carbon Nanotube Coating on Titanium Substrate

UMEDA Junko, MIMOTO Takanori, KONDOH Katsuyoshi, FUGETSU Bunshi

Trans. JWRI　Vol. 41　No. 1　p. 49-52　2012/06　Research paper (bulletin of university, research institution)

High-temperature properties of extruded titanium composites fabricated from carbon nanotubes coated titanium powder by spark plasma sintering and hot extrusion

Katsuyoshi Kondoh, Thotsaphon Threrujirapapong, Junko Umeda, Bunshi Fugetsu

COMPOSITES SCIENCE AND TECHNOLOGY　Vol. 72　No. 11　p. 1291-1297　2012/06　Research paper (scientific journal)

Synthesis kinetics of Mg2Si and solid-state formation of Mg-Mg2Si composite

Bin Sun, Shufeng Li, Hisashi Imai, Junko Umeda, Katsuyoshi Kondoh

POWDER TECHNOLOGY　Vol. 217　p. 157-162　2012/02　Research paper (scientific journal)

Multi-Walled Carbon Nanotubes Reinforced Titanium Composites via Powder Metallurgy Process

Katsuyoshi Kondoh, Thotsaphon Threrujirapapong, Sun Bin, Hisashi Imai, Li Shufeng, Junko Umeda, Bunshi Fugetsu

POWDER METALLURGY OF TITANIUM: POWDER PROCESSING, CONSOLIDATION AND METALLURGY OF TITANIUM　Vol. 520　p. 261-+　2012　Research paper (international conference proceedings)

COST EFFECTIVE AND ECO-FRIENDLY PROCESS FOR PREPARATION OF WROUGHT PURE Ti MATERIAL VIA DIRECT CONSOLIDATION OF TiH2 POWDERS

Takanori Mimoto, Nozomi Nakanishi, Thotsaphon Threrujirapapong, Junko Umeda, Katsuyoshi Kondoh

TMS 2012 141ST ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 1: MATERIALS PROCESSING AND INTERFACES　p. 879-886　2012　Research paper (international conference proceedings)

INTERFACIAL ANALYSIS OF CNT REINFORCED AZ61 MG ALLOY COMPOSITES

Katsuyoshi Kondoh, Hiroyuki Fukuda, Junko Umeda, Bunshi Fugetsu

TMS 2012 141ST ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 1: MATERIALS PROCESSING AND INTERFACES　p. 717-723　2012　Research paper (international conference proceedings)

Mechanical Properties and Strengthening Mechanism of Pure Ti Powder Composite Material Reinforced with Carbon Nano Particles

MIMOTO Takanori, NAKANISHI Nozomi, UMEDA Junko, KONDOH Katsuyoshi

Trans. JWRI　Vol. 40　No. 2　p. 63-68　2011/12　Research paper (bulletin of university, research institution)

Fabrication of Powder Metallurgy Pure Ti Material by Using Thermal Decomposition of TiH2

Takanori MIMOTO, Nozomi NAKANISHI, Junko UMEDA, Katsuyoshi KONDOH

Journal of High Temperature Society　Vol. 37　No. 6　p. 326-331　2011/11　Research paper (scientific journal)

Kinetic Analysis of Solid-State Formation of Mg2Si by Powder Metallurgy Process

Bin SUN, Shufeng LI, Hisashi IMAI, Junko UMEDA, Katsuyoshi KONDOHI

Journal of High Temperature Society　Vol. 37　No. 6　p. 321-325　2011/11　Research paper (scientific journal)

Surface Corrosion Behavior of Electron-Excited Pure Mg

K. Funatsu, R. Takei, J. Umeda, K. Kondoh

Proceedings of Materials Science & Technology (MS&T) 2011　p. 1397-1404　2011/10　Research paper (international conference proceedings)

Composite Titanium Powder Coated with Carbon Black Particles Using Wasted Black Ink and Mechanical Properties of Its Extruded Material

T. Mimoto, N. Nakanishi, T. Threrujirapapong, J. Umeda, K. Kondoh

Proceedings of Materials Science & Technology (MS&T) 2011　p. 1002-1009　2011/10　Research paper (international conference proceedings)

Thermo-dynamic analysis on solid-state reduction of CaO particles dispersed in Mg-Al alloy

Katsuyoshi Kondoh, Junji Fujita, Junko Umeda, Hisashi Imai, Keitaro Enami, Masaki Ohara, Takanori Igarashi

MATERIALS CHEMISTRY AND PHYSICS　Vol. 129　No. 1-2　p. 631-640　2011/09　Research paper (scientific journal)

The texture and anisotropy of hot extruded magnesium alloys fabricated via rapid solidification powder metallurgy

Ayman Elsayed, Junko Umeda, Katsuyoshi Kondoh

MATERIALS & DESIGN　Vol. 32　No. 8-9　p. 4590-4597　2011/09　Research paper (scientific journal)

Effect of Chromium Precipitation on Machinability of Sintered Brass Alloys Dispersed with Graphite Particles

Hisashi Imai, Shufeng Li, Katsuyoshi Kondoh, Yoshiharu Kosaka, Akimichi Kojima, Haruhiko Atsumi, Junko Umeda

MATERIALS TRANSACTIONS　Vol. 52　No. 7　p. 1426-1430　2011/07　Research paper (scientific journal)

Electron Excitation Effect of Pure Mg Surface on initial Corrosion Phenomenon

FUNATSU Keisuke, TAKEI Rei, UMEDA Junko, KONDOH Katsuyoshi

Trans. JWRI　Vol. 40　No. 1　p. 9-14　2011/06　Research paper (bulletin of university, research institution)

Fabrication of magnesium based composites reinforced with carbon nanotubes having superior mechanical properties

Hiroyuki Fukuda, Katsuyoshi Kondoh, Junko Umeda, Bunshi Fugetsu

MATERIALS CHEMISTRY AND PHYSICS　Vol. 127　No. 3　p. 451-458　2011/06　Research paper (scientific journal)

Aging behavior of the matrix of aluminum-magnesium-silicon alloy including carbon nanotubes

Hiroyuki Fukuda, Katsuyoshi Kondoh, Junko Umeda, Bunshi Fugetsu

MATERIALS LETTERS　Vol. 65　No. 11　p. 1723-1725　2011/06　Research paper (scientific journal)

Interfacial analysis between Mg matrix and carbon nanotubes in Mg-6 wt.% Al alloy matrix composites reinforced with carbon nanotubes

Hiroyuki Fukuda, Katsuyoshi Kondoh, Junko Umeda, Bunshi Fugetsu

COMPOSITES SCIENCE AND TECHNOLOGY　Vol. 71　No. 5　p. 705-709　2011/03　Research paper (scientific journal)

Evaluation of Galvanic Corrosion Phenomenon between α-Mg Matrix and Metallic Dispersoids in Mg Alloys Using Surface Potential Difference

Rei Takei, Junko Umeda, Katsuyoshi Kondoh

Trans. Jpn. Soc. Mech. Eng. -Part A　Vol. 77　No. 774　p. 301-315　2011/02　Research paper (scientific journal)

Evaluation of Initial Corrosion Phenomenon of Magnesium Alloys by SKPFM

Katsuyoshi Kondoh, Nozomi Nakanishi, Rei Takei, Hiroyuki Fukuda, Junko Umeda

LIGHT METALS TECHNOLOGY V　Vol. 690　p. 397-+　2011　Research paper (international conference proceedings)

Un-bundled Carbon Nanotubes Reinforced Light Metal Composites via Powder Metallurgy Route

Katsuyoshi Kondoh, Thotsaphon Threrujirapapong, Hiroyuki Fukuda, Junko Umeda

LIGHT METALS TECHNOLOGY V　Vol. 690　p. 339-+　2011　Research paper (international conference proceedings)

THE PRODUCTION OF POWDER METALLURGY HOT EXTRUDED Mg-Al-Mn-Ca ALLOY WITH HIGH STRENGTH AND LIMITED ANISOTROPY

Ayman Elsayed, Junko Umeda, Katsuyoshi Kondoh

MAGNESIUM TECHNOLOGY 2011　p. 475-480　2011　Research paper (international conference proceedings)

EFFECT OF REACTED LAYER ON GALVANIC CORROSION PHENOMENON AT INTERFACE BETWEEN TI DISPERSION AND MG-AL ALLOY

Katsuyoshi Kondoh, Nozomi Nakanishi, Rei Taker, Junko Umeda

TMS2011 SUPPLEMENTAL PROCEEDINGS, VOL 3: GENERAL PAPER SELECTIONS　p. 93-100　2011　Research paper (international conference proceedings)

Effects of SPS parameters on the mechanical properties and microstructures of titanium reinforced with multi-wall carbon nanotubes produced by hot extrusion

Thotsaphon Threrujirapapong, Takahiro Mimoto, Katsuyoshi Kondoh, Junko Umeda, Bunshi Fugetsu

TMS2011 SUPPLEMENTAL PROCEEDINGS, VOL 2: MATERIALS FABRICATION, PROPERTIES, CHARACTERIZATION, AND MODELING　p. 821-828　2011　Research paper (international conference proceedings)

Application of rapid solidification powder metallurgy to the fabrication of high-strength, high-ductility Mg-Al-Zn-Ca-La alloy through hot extrusion

Elsayed Ayman, Umeda Junko, Kondoh Katsuyoshi

ACTA MATERIALIA　Vol. 59　No. 1　p. 273-282　2011/01　Research paper (scientific journal)

High-purification of amorphous silica originated from rice husks by combination of polysaccharide hydrolysis and metallic impurities removal

Junko Umeda, Katsuyoshi Kondoh

INDUSTRIAL CROPS AND PRODUCTS　Vol. 32　No. 3　p. 539-544　2010/11　Research paper (scientific journal)

Advantages of a Wet Process for the Production of Ti Matrix Composite Reinforced with Carbon Nano Materials by Powder Metallurgy Route

T. Threrujirapapong, K. Kondoh, H. Imai, J. Umeda, B. Fugetsu

CD Proceedings World PM2010: International Powder Metallurgy Congress & Exhibition　2010/10　Research paper (international conference proceedings)

Carbon Nanotube Reinforced Pure Titanium Powder Composite Materials by Using Zwitterionic Surfactant Solution

K. Kondoh, T. Threrujirapapong, J. Umeda

Proceedings of Materials Science & Technology (MS&T) 2010　p. 2233-2238　2010/10　Research paper (international conference proceedings)

SKPFM Quantitative Evaluation of Initial Galvanic Corrosion Phenomenon of Magnesium Alloys

K. Kondoh, R. Takei, H. Fukuda, J. Umeda, H. Imai

Proceedings of Materials Science & Technology (MS&T) 2010　p. 745-752　2010/10　Research paper (international conference proceedings)

Microstructural and mechanical properties of titanium particulate reinforced magnesium composite materials

Junko Umeda, Masashi Kawakami, Katsuyoshi Kondoh, El-Sayed Ayman, Hisashi Imai

MATERIALS CHEMISTRY AND PHYSICS　Vol. 123　No. 2-3　p. 649-657　2010/10　Research paper (scientific journal)

Relationship between surface potential difference and galvanic corrosion of Magnesium Alloy Using SKPFM

Rei TAKEI, Hisashi IMAI, Junko UMEDA, Katsuyoshi KONDOH

Trans. JWRI　Vol. 39　No. 1　p. 75-80　2010/09　Research paper (bulletin of university, research institution)

Hot Extrusion of Pure Titanium Reinforced with Carbon Nanotubes

Thotsaphon Threrujirapapong, Katsuyoshi Kondoh, Hisashi Imai, Junko Umeda, Bunshi Fugetsu

STEEL RESEARCH INTERNATIONAL　Vol. 81　No. 9　p. 1320-1323　2010/09　Research paper (scientific journal)

Microstructure and Mechanical Properties of Hot Extruded ZK61 Alloy Produced by Rapid Solidified Powder Metallurgy

Ayman Elsayed, Hisashi Imai, Junko Umeda, Katsuyoshi Kondoh

STEEL RESEARCH INTERNATIONAL　Vol. 81　No. 9　p. 1304-1307　2010/09　Research paper (scientific journal)

Machinability and mechanical properties of lead-free wrought brass alloys with bismuth and graphite particles by powder metallurgy process

Imai Hisashi, Katsuyoshi Kondoh, Shufeng Li, Haruhiko Atsumi, Yoshiharu Kosaka, Akimichi Kojima, Junko Umeda

Proceedings of the 7th International Copper-Cobre Conference 2010　Vol. 1　p. 89-98　2010/06　Research paper (international conference proceedings)

Microstructural and mechanical analysis of carbon nanotube reinforced magnesium alloy powder composites

Katsuyoshi Kondoh, Hiroyuki Fukuda, Junko Umeda, Hisashi Imai, Bunshi Fugetsu, Morinobu Endo

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 527　No. 16-17　p. 4103-4108　2010/06　Research paper (scientific journal)

Microstructure and mechanical properties of hot extruded Mg-Al-Mn-Ca alloy produced by rapid solidification powder metallurgy

Ayman Elsayed, Katsuyoshi Kondoh, Hisashi Imai, Junko Umeda

MATERIALS & DESIGN　Vol. 31　No. 5　p. 2444-2453　2010/05　Research paper (scientific journal)

Aluminum-4 mass% Copper/Alumina Composites Produced from Aluminum Copper and Rice Husk Ash Silica Powders by Powder Forging

Tachai Luangvaranunt, Chinawad Dhadsanadhep, Junko Umeda, Ekasit Nisaratanaporn, Katsuyoshi Kondoh

MATERIALS TRANSACTIONS　Vol. 51　No. 4　p. 756-761　2010/04　Research paper (scientific journal)

Characteristics and machinability of lead-free P/M Cu60-Zn40 brass alloys dispersed with graphite

Hisashi Imai, Yoshiharu Kosaka, Akimichi Kojima, Shufeng Li, Katsuyoshi Kondoh, Junko Umeda, Haruhiko Atsumi

POWDER TECHNOLOGY　Vol. 198　No. 3　p. 417-421　2010/03　Research paper (scientific journal)

Microstructures and mechanical responses of powder metallurgy non-combustive magnesium extruded alloy by rapid solidification process in mass production

Katsuyoshi Kondoh, El-Sayed Ayman Hamada, Hisashi Imai, Junko Umeda, Tyrone Jones

MATERIALS & DESIGN　Vol. 31　No. 3　p. 1540-1546　2010/03　Research paper (scientific journal)

Corrosion Phenomenon Evaluation of Mg Alloys using Surface Potential Difference Measured by SKPFM

Rei Takei, Hiroyuki Fukuda, Hisashi Imai, Junko Umeda, Katsuyoshi Kondoh

MAGNESIUM TECHNOLOGY 2010　p. 169-+　2010　Research paper (international conference proceedings)

FABRICATION OF HIGH STRENGTH PURE Ti MATRIX COMPOSITE REINFORCED WITH CARBON BLACK PARTICLE VIA WET PROCESS

Thotsaphon Threrujirapapong, Katsuyoshi Kondoh, Hisashi Imai, Junko Umeda, Bunshi Fugetsu

TMS 2010 139TH ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 2: MATERIALS CHARACTERIZATION, COMPUTATION AND MODELING AND ENERGY　p. 181-+　2010　Research paper (international conference proceedings)

UN-BUNDLED CARBON NANOTUBES REINFORCED TITANIUM COMPOSITES VIA POWDER METALLURGY PROCESS

Katsuyoshi Kondoh, Thotsaphon Threrujirapapong, Hisashi Imai, Junko Umeda, Bunshi Fugetsu

TMS 2010 139TH ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 2: MATERIALS CHARACTERIZATION, COMPUTATION AND MODELING AND ENERGY　p. 173-+　2010　Research paper (international conference proceedings)

Wettability of pure Ti by molten pure Mg droplets

Katsuyoshi Kondoh, Masashi Kawakami, Hisashi Imai, Junko Umeda, Hidetoshi Fujii

ACTA MATERIALIA　Vol. 58　No. 2　p. 606-614　2010/01　Research paper (scientific journal)

Effect of Consolidation and Extrusion Temperatures on Tensile Properties of Hot Extruded ZK61 Magnesium Alloy Gas Atomized Powders via Spark Plasma Sintering

ELSAYED Ayman, IMAI Hisashi, UMEDA Junko, KONDOH Katsuyoshi

Trans. JWRI　Vol. 38　No. 2　p. 31-35　2009/12　Research paper (bulletin of university, research institution)

Polysaccharide Hydrolysis and Metallic Impurities Removal Behavior of Rice Husks in Citric Acid Leaching Treatment

UMEDA Junko, IMAI Hisashi, KONDOH Katsuyoshi

Trans. JWRI　Vol. 38　No. 2　p. 13-18　2009/12　Research paper (bulletin of university, research institution)

Mechanical Properties of a Titanium Matrix Composite Reinforced with Low Cost Carbon Black via Powder Metallurgy Processing

Thotsaphon Threrujirapapong, Katsuyoshi Kondoh, Hisashi Imai, Junko Umeda, Bunshi Fugetsu

MATERIALS TRANSACTIONS　Vol. 50　No. 12　p. 2757-2762　2009/12　Research paper (scientific journal)

Improved Mechanical Response of Hot Extruded SWAP Mg-Al-Zn-Ca Powder with Different Rare-Earth Element Additions

A. Elsayed, H. Imai, J. Umeda, K. Kondoh

Proc. Magnesium: 8th International Conference on Magnesium Alloys and their Applications　p. 758-763　2009/10　Research paper (international conference proceedings)

Microstructural and Mechanical Properties of Magnesium Matrix Composite Reinforced with Titanium Powders via Powder Metallurgy Process

K. Kondoh, M. Kawakami, J. Umeda, H. Imai, H. Fujii

Proc. Magnesium: 8th International Conference on Magnesium Alloys and their Applications　p. 668-675　2009/10　Research paper (international conference proceedings)

Mechanical Properties and Machinability of Extruded Cu-40%Zn Brass Alloys with Bismuth via Powder Metallurgy Process

IMAI Hisashi, LI shufeng, ATSUMI Haruhiko, KOSAKA Yoshiharu, KOJIMA Akimichi, UMEDA Junko, KONDOH Katsuyoshi

Trans. JWRI　Vol. 38　No. 1　p. 25-30　2009/09　Research paper (bulletin of university, research institution)

Effect of Different La Additions on the Microstructure and Mechanical Properties of Hot Extruded SWAP Mg-Al-Zn-Ca Powder

ELSAYED Ayman, KONDOH Katsuyoshi, IMAI Hisashi, UMEDA Junko

Trans. JWRI　Vol. 38　No. 1　p. 19-23　2009/09　Research paper (bulletin of university, research institution)

Titanium Matrix Composite Reinforced with In-situ Formed TiC Using Carbon Black Nano Particles via a Wet Process

THRERUJIRAPAPONG Thotsaphon, KONDOH Katsuyoshi, IMAI Hisashi, UMEDA Junko, FUGETSU Bunshi

Trans. JWRI　Vol. 38　No. 1　p. 13-17　2009/09　Research paper (bulletin of university, research institution)

Cavitation erosion of aluminum matrix sintered composite with AlN dispersoids

Katsuyoshi Kondoh, Junko Umeda, Ryuzo Watanabe

WEAR　Vol. 267　No. 9-10　p. 1511-1515　2009/09　Research paper (scientific journal)

Rapidly Solidified Magnesium Alloy Coarse Powder by SWAP and Characteristics of Its Wrought Alloy

Katsuyoshi Kondoh, EL-Sayed Ayman Hamada, Hiroyuki Fukuda, Masashi Kawakami, Hisashi Imai, Junko Umeda

Proceedings of The Third International Conference of Processing Materials for Properties (PMP-III), MMIJ Session in Sapporo 2009　p. 913-918　2009/09　Research paper (international conference proceedings)

Characteristics of powder metallurgy pure titanium matrix composite reinforced with multi-wall carbon nanotubes

Katsuyoshi Kondoh, Thotsaphon Threrujirapapong, Hisashi Imai, Junko Umeda, Bunshi Fugetsu

COMPOSITES SCIENCE AND TECHNOLOGY　Vol. 69　No. 7-8　p. 1077-1081　2009/06　Research paper (scientific journal)

Estimation of Compositions of Zr-Cu Binary Sputtered Film and Its Characterization

Katsuyoshi Kondoh, Junji Fujita, Junko Umeda, Tadashi Serikawa

Advances in Materials Science and Engineering　Vol. 2008　2009/04　Research paper (scientific journal)

Machinable Cu-40%Zn Composites Containing Graphite Particles by Powder Metallurgy Process

K. Kondoh, H. Imai, Y. Kosaka, A. Kojima, J. Umeda

Journal of Metallurgy　Vol. 2009　2009/03　Research paper (scientific journal)

Friction and wear behavior of sintered magnesium composite reinforced with CNT-Mg2Si/MgO

Junko Umeda, Katsuyoshi Kondoh, Hisashi Imai

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 504　No. 1-2　p. 157-162　2009/03　Research paper (scientific journal)

Powder metallurgy magnesium composite with magnesium silicide in using rice husk silica particles

Junko Umeda, Katsuyoshi Kondoh, Masashi Kawakami, Hisashi Imai

POWDER TECHNOLOGY　Vol. 189　No. 3　p. 399-403　2009/02　Research paper (scientific journal)

Tribological Analysis of Mg2Si Particulates Reinforced Powder Metallurgy Magnesium Alloy Composites under Oil Lubrication Condition

Katsuyoshi Kondoh, Junko Umeda, Kenshi Kawabata

ADVANCES IN MATERIALS SCIENCE AND ENGINEERING　Vol. 2009　2009　Research paper (scientific journal)

The In-Situ Fabrication of Ai-A1N Composites from Metal Powders and their Resistance to Wear and Cavitation

Ma Qian, K. Kondoh, D. Kent, J. Umeda, P. Yu, G. B. Schaffer

LIGHT METALS TECHNOLOGY 2009　Vol. 618-619　p. 617-+　2009　Research paper (international conference proceedings)

Microstructural and Mechanical Properties of Titanium Matrix Composites Reinforced with Nano Carbon Materials via Powder Metallurgy Process

Katsuyoshi Kondoh, Thotsaphon Threrujirapapong, Junko Umeda, Hisashi Imai, Bunshi Fugetsu

LIGHT METALS TECHNOLOGY 2009　Vol. 618-619　p. 495-+　2009　Research paper (international conference proceedings)

Magnesium Matrix Composites Reinforced with Titanium Particles

Katsuyoshi Kondoh, Masashi Kawakami, Junko Umeda, Hisashi Imai

LIGHT METALS TECHNOLOGY 2009　Vol. 618-619　p. 371-375　2009　Research paper (international conference proceedings)

High Performance Recycling of Agricultural Wastes: Rice Husk Silica Used as Reinforcements of Magnesium Sintered Materials

Katsuyoshi Kondoh, Junko Umeda, Hisashi Kawakami, Hisashi Imai

EPD CONGRESS 2009, PROCEEDINGS　p. 885-888　2009　Research paper (international conference proceedings)

Mechanical Properties of Powder Metallurgy Titanium Alloys Dispersed with Carbon Nano Particles

Katsuyoshi Kondoh, Thotsaphon Threrujirapapong, Hisashi Imai, Junko Umeda, Bunshi Fugetsu

TMS 2009 138TH ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 3: GENERAL PAPER SELECTIONS　p. 59-+　2009　Research paper (international conference proceedings)

Cavitation resistance of powder metallurgy aluminum matrix composite with AlN dispersoids

Katsuyoshi Kondoh, Junko Umeda, Ryuzo Watanabe

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 499　No. 1-2　p. 440-444　2009/01　Research paper (scientific journal)

Environmental Benign Brass Alloys Dispersed with Graphite Particles Fabricated Via Solid-State Sintering Process

KONDOH Katsuyoshi, IMAI Hisashi, UMEDA Junko, KOSAKA Yoshiharu, KOJIMA Akimichi

Trans. JWRI　Vol. 37　No. 2　p. 87-89　2008/12　Research paper (bulletin of university, research institution)

Friction and Wear Behavior of Titanium Matrix Composite Reinforced with Carbon Nanotubes under Dry Conditions

THRERUJIRAPAPONG Thotsaphon, KONDOH Katsuyoshi, UMEDA Junko, IMAI Hisashi

Trans. JWRI　Vol. 37　No. 2　p. 51-56　2008/12　Research paper (bulletin of university, research institution)

Mechanical Characteristics of Hot Extruded Non-Combustible Magnesium Alloy using Water Atomized Powder

ELSAYED Ayman, KONDOH Katsuyoshi, IMAI Hisashi, UMEDA Junko, KAWAKAMI Masashi

Trans. JWRI　Vol. 37　No. 2　p. 43-49　2008/12　Research paper (bulletin of university, research institution)

Tribological Response of Powder Metallurgy Magnesium Composite Containing Reactive Amorphous Silica Particles with Porous Structure and Multi-Wall Carbon Nanotubes

UMEDA Junko, KONDOH Katsuyoshi, IMAI Hisashi, FUGETSU Bunshi

Trans. JWRI　Vol. 37　No. 2　p. 37-42　2008/12　Research paper (bulletin of university, research institution)

Microstructural and Phase Analysis of Zirconium and Copper Binary Thin Film Sputtered by using Elemental Composite Targets

KONDOH Katsuyoshi, FUJITA Junji, UMEDA Junko, IMAI Hisashi, SERIKAWA Tadashi

Trans. JWRI　Vol. 37　No. 2　p. 33-36　2008/12　Research paper (bulletin of university, research institution)

High-purity amorphous silica originated in rice husks via carboxylic acid leaching process

Junko Umeda, Katsuyoshi Kondoh

JOURNAL OF MATERIALS SCIENCE　Vol. 43　No. 22　p. 7084-7090　2008/11　Research paper (scientific journal)

放電焼結法を用いた60Cu-40Zn黄銅合金粉末押出材の特性

今井 久志, 近藤 勝義, 上坂 美治, 小島 明倫, 片野 元, 梅田 純子

粉体および粉末冶金　Vol. 55　No. 10　p. 743-749　2008/10　Research paper (scientific journal)

Amorphous silica originated from rice husks and its characteristics

K. Kondoh, J. Umeda

Proc. 2008 JSME International Conference on Materials and Processing(ICM&P2008)　2008/10　Research paper (international conference proceedings)

Environmentally Benign Process of High Purity Amorphous Silica Originated in Rice Husks of Agricultural Wastes

J. Umeda, K. Kondoh, Y. Michiura

Proc. 2008 Global Symposium on Recycling, Waste Treatment and Clean Technology (REWAS 2008), TMS　p. 1493-1498　2008/10　Research paper (international conference proceedings)

Advanced Solid-State Recycle of Magnesium Alloy Wastes by Repetitive Severe Plastic Working for High-Strengthened Wrought Materials

K. Kondoh, K. Kawabata, J. Umeda, K. Kaneko, M. Ueda

Proc. 2008 Global Symposium on Recycling, Waste Treatment and Clean Technology (REWAS 2008), TMS　p. 815-820　2008/10　Research paper (international conference proceedings)

Mechanical Properties of P/M Pure Ti with CNT/TiC Nano Composite Structure

T. Threrujirapapong, K. Kondoh, H. Imai, J. Umeda

5th Thailand Materials Science and Technology Conference (MSAT-5)　p. 304-306　2008/09　Research paper (international conference proceedings)

Reactivity of Magnesium and High-purity Silica Originated in Rice Husks

J. Umeda, K. Kondoh, M. Kawakami, H. Imai

5th Thailand Materials Science and Technology Conference (MSAT-5)　p. 54-56　2008/09　Research paper (international conference proceedings)

Solid State Synthesis of Mg2Si/MgO Composites from an Elemental Mixture Powder of Magnesium and Rice Husk Silica

UMEDA Junko, KONDOH Katsuyoshi, KAWAKAMI Masashi, IMAI Hisashi

Trans. JWRI　Vol. 37　No. 1　p. 113-117　2008/09　Research paper (bulletin of university, research institution)

Microstructures and Mechanical Properties of Powder Metallurgy Pure Ti Composite Reinforced with Carbon Nanotubes

THRERUJIRAPAPONG Thotsaphon, KONDOH Katsuyoshi, IMAI Hisashi, UMEDA Junko, FUGETSU Bunshi

Trans. JWRI　Vol. 37　No. 1　p. 57-61　2008/09　Research paper (bulletin of university, research institution)

Wear Behavior of Sintered Magnesium Matrix Composites Reinforced with Mg2Si Particle under Wet Sliding Conditions

KONDOH Katsuyoshi, UMEDA Junko, KAWABATA Kenshi, SEKI Yoshikazu, KAWAMURA Yoshihito

Trans. JWRI　Vol. 37　No. 1　p. 45-49　2008/09　Research paper (bulletin of university, research institution)

Process Optimization to Prepare High-purity Amorphous Silica from Rice Husks via Citric Acid Leaching Treatment

UMEDA Junko, KONDOH Katsuyoshi

Trans. JWRI　Vol. 37　No. 1　p. 13-17　2008/09　Research paper (bulletin of university, research institution)

Characteristics of High-Purity Amorphous Silica Originated in Rice Husks

Katsuyoshi Kondoh, Junko Umeda, Yoshisada Michiura

Smart Processing Technology　Vol. 2　p. 79-82　2008/03　Research paper (scientific journal)

CNTs/TiC Reinforced Titanium Matrix Nanocomposites via Powder Metallurgy and Its Microstructural and Mechanical Properties

Katsuyoshi Kondoh, Thotsaphon Threrujirapapong, Hisashi Imai, Junko Umeda, Bunshi Fugetsu

JOURNAL OF NANOMATERIALS　Vol. 2008　2008　Research paper (scientific journal)

Environmentally Benign Reuse of Agricultural Wastes to Prepare High-Purity Silica from Rice Husks

UMEDA Junko, KONDOH Katsuyoshi, MICHIURA Yoshisada

Trans. JWRI　Vol. 36　No. 2　p. 17-21　2007/12　Research paper (bulletin of university, research institution)

Process parameters optimization in preparing high-purity amorphous silica originated from rice husks

Junko Umeda, Katsuyoshi Kondoh, Yoshisada Michiura

MATERIALS TRANSACTIONS　Vol. 48　No. 12　p. 3095-3100　2007/12　Research paper (scientific journal)

Utilization of Bio-Silica Prepared from Rice Husks as Reinforcements of Magnesium Alloys

K.Kondoh, J.Umeda, H.Oginuma

Proceeding of The 2nd Workshop on the Utilization of Rice Husk and Rice Husk Silica　2007/07　Research paper (international conference proceedings)

Optimization of Process Parameters to Prepare High-purity Amorphous Silica from Rice Husks

J.Umeda, K. Kondoh, Y.Michiura

Proceeding of The 2nd Workshop on the Utilization of Rice Husk and Rice Husk Silica　2007/07　Research paper (international conference proceedings)

Characteristics Of High-Purity Amorphous Silica In Rice Husks

K.Kondoh, J.Umeda, H.Oginuma, Y.Michiura

Advances in Eco-materials　Vol. 1　p. 153-160　2007/07　Research paper (international conference proceedings)

Innovative reuse of agricultural wastes as industrial raw materials to form magnesium composites

K. Kondoh, H. Oginuma, J. Umeda, Y. Oki, T. Umeda

Advanced in Ecomaterials, ICEM7, ICMAT2005, MRS-Singapore　Vol. 46　No. 12　p. 2586-2591　2005/07　Research paper (international conference proceedings)