Yamamoto Takahisa

Research field (1)： Inorganic compounds/materials chemistry

Research theme for competitive and other funds (30)：

2019 - 2024 Nanoscale Interface Characterization
2017 - 2020 Construction of precise step terrace structure with high surface atom density and minimized point defect density
2016 - 2020 フラッシュ焼結の学理構築と革新的焼結技術への展開
2013 - 2018 Development of nanometer scale electronic state analysis methods
2014 - 2017 Microstructural evolution of materials with hierarchic structure and their strength

2014 - 2017 Grain boundary structure of ceramics

2014 - 2016 Atomic structure of dislocation core in SrTiO3

2012 - 2014 Development of nano waires from threading dislocations

2010 - 2012 Development of microscopic observation under atmospheric and stress environment and its application to ceramics

2007 - 2012 Nano Materials Science for Atomic Scale Modification

2009 - 2011 Development of dislocation nano-wires in SrTiO_3

2007 - 2011 Development of functional thin films modified by nano-dopant

2007 - 2009 Growth and material applications of narrow-bandgap III-V-N alloy semiconductor quantum nano-structures

2006 - 2008 Creation of SrTiO3 bicrystals

2006 - 2008 Development of novel ceramic device by controlling dislocation array

2004 - 2006 Application of Supersonic Free-Jet PVD applied to Nano-structure Coating

2004 - 2005 転位組織制御による電子セラミックデバイスの試作

2003 - 2004 Fabrication of single boundary electroceramic devices controlled by localized quantum structure at boundaries

2002 - 2004 DESIGN OF CERAMICS BY COTROLLING GRAIN BOUNDARY CHARACTER AND QUANTUM STRUCTURES

2000 - 2004 セラミックス粒界の局在量子構造

2000 - 2004 局在量子構造に基づいた新しい材料機能創出技術の構築

2002 - 2003 Development of Supersonic Free-Jet PVD with nano-sized culsters

2001 - 2003 Development of TEM in-situ system for interface structure in ceramic material

2001 - 2003 DEVELOPMENT OF NANO-CBN THIN FILM DEVICES WORKING AT HIGH-TEMPERATURES UNDER SEVERE CONDITIONS

2001 - 2002 Electrical properties in semiconductive SrTiO_3 bicrystals

1998 - 1999 Electrical properties in semiconducting BaTiOィイD23ィエD2 bicrystals

1995 - 1995 BaTiO_3基単粒界PTCR素子の作成および特性評価

1994 - 1994 チタン酸バリウムの結晶粒成長挙動の制御と焼結法を用いた単結晶の作製

1993 - 1993 焼結法によるチタン酸バリウム単結晶の作製

1990 - 1990 強誘電性セラミックスの散漫相転移の発現機構に関する研究

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Papers (279)：

Hiroshi Masuda, Tomoharu Tokunaga, Takahisa Yamamoto, Hidehiro Yoshida. Optical and mechanical properties of rutile TiO2 subjected to AC flash processing. Scripta Materialia. 2024. 246. 116088-116088
Mikito Seko, Shunta Inagaki, Tomoharu Tokunaga, Shunsuke Kobayashi, Atsutomo Nakamura, Takahisa Yamamoto. Applying an alternating current to strontium titanate minimizes the change in oxidation state caused by flash sintering. Journal of the European Ceramic Society. 2024. 44. 5. 2965-2971
Shunsuke Kayukawa, Yutaro Katsuyama, Ayu Kodaira, Tomoharu Tokunaga, Koji Morita, Atsutomo Nakamura, Takahisa Yamamoto. Flash healing of Vickers microcracks formed on the (001) surface of cubic zirconia single crystals. Journal of the European Ceramic Society. 2023. 43. 14. 6272-6278
Yuki Ishino, Masao Koike, Ayu Kodaira, Tomoharu Tokunaga, Takahisa Yamamoto. Near-full compaction within only 30 min of total sintering time by shrinkage-rate-controlled flash sintering in 3 mol % Y2O3-doped ZrO2 polycrystal. Journal of the Ceramic Society of Japan. 2023. 131. 10. 600-607
Watanabe, Atsuya, Yamamoto, Takahisa, Miyamoto, R, Takigawa, Yorinobu. Microstructure and tensile strength of electrodeposited Fe-rich bcc FeCoNi medium-entropy alloys. Materials Science and Technology. 2023. 39. 15. 2028-2034

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