論文 - 山本 剛久
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Optical and mechanical properties of rutile TiO2 subjected to AC flash processing 査読有り
Hiroshi Masuda, Tomoharu Tokunaga, Takahisa Yamamoto, Hidehiro Yoshida
Scripta Materialia 246 巻 頁: 116088 2024年3月
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Variation of grain boundary dihedral angles caused by voltage-to-current-based flash treatment in fully stabilized yttria-doped zirconia polycrystals 査読有り
M. Seko, S. Kayukawa, S. Inagaki, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 132 巻 ( 2 ) 頁: 63 - 67 2024年2月
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Applying an alternating current to strontium titanate minimizes the change in oxidation state caused by flash sintering 査読有り
M. Seko, S. Inagaki, T. Tokunaga, S. Kobayashi, A. Nakamura, T. Yamamoto
Journal of the European Ceramic Society 44 巻 頁: 2965 - 2971 2023年12月
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One-pot synthesis of Ag–In–Ga–S nanocrystals embedded in a Ga2O3 matrix and enhancement of band-edge emission by Na+ doping 査読有り
M. Tozawa, C. Miyamae, K. Akiyoshi, T. Kameyama, T. Yamamoto, G. Motomura, Y. Fujisaki, T. Uematsu, S. Kuwabata, T. Torimoto
Nanoscale Advances 5 巻 頁: 7057 - 7066 2023年11月
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Near-full compaction within only 30 min of total sintering time by shrinkage-rate-controlled flash sintering in 3 mol% Y2O3-doped ZrO2 polycrystal 査読有り
Yuki ISHINO, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO
Journal of the Ceramic Society of Japan 131 巻 ( 10 ) 2023年10月
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Improvements in Flash Sintering for Practical Application 査読有り
Takahisa YAMAMOTO
Materials Transactions 64 巻 ( 9 ) 頁: 2059 - 2068 2023年9月
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StructuralDefectEffecton the ConcentrationQuenchingofTbxY2−xO3PhosphorThin Films 査読有り
Shizuka Suzuki, Takuro Dazai, Tomoharu Tokunaga, Takahisa Yamamoto, Ryuzi Katoh, Ryota Takahashi
J. Phys.Chem.C 127 巻 頁: 9380 - 9387 2023年9月
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Apparent Sintering Activation Energy Estimated by Master Sintering Curves for 8 mol% Y2O3 Doped ZrO2 Polycrystals during Shrinkage-Rate Controlled Flash Sintering 査読有り
Masao KOIKE, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO
Materials Transactions 64 巻 ( 9 ) 頁: 2315 - 2320 2023年9月
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Hydrogarnet-Derived Porous Polyhedral Particles of SrFeO3-δ Perovskite 査読有り
H. Otaguro, T. Takeno, R. Sugimoto, S. Hosokawa, H. Akamatsu, T. Yamamoto, K. Nakanishi, K. Hayashi, G. Hasegawa
Chemistry Materials 35 巻 頁: 6423 - 6436 2023年8月
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PromotingOxygenReductionReactionby ExcitationofLocalizedSurfacePlasmonof Shape-and Facet-ControlledOctahedralAu@PtCore-ShellNanocrystals 査読有り
Tatsuya Kameyama, Kentaro Sato, Takahisa Yamamoto, Mamoru Tamura, Takuya Iida, Tatsuya Shoji, Yasuyuki Tsuboi, Tsukasa Torimoto
ChemElectroChem 10 巻 頁: e202300182 2023年7月
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ナノインデンテーション法を用いた高純度アルミニウム合金の 局所力学特性に及ぼす添加元素の影響解明 査読有り
寺崎保裕, 望月喬史, 小畠淳平, 山本剛久, 瀧川順庸
日本金属学会誌 87 巻 ( 7 ) 頁: 219 - 225 2023年7月
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Flash healing of Vickers microcracks formed on the (001) surface of cubic zirconia single crystals 査読有り
Shunsuke KAYUKAWA, Yutaro KATSUYAMA, Ayu KODAIRA, Tomoharu TOKUNAGA, Koji MORITA, Atsutomo NAKAMURA, and Takahisa YAMAMOTO
Journal of the European Ceramic Society 43 巻 頁: 6272 - 6278 2023年6月
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Scanning electron microscopy observation in wide field of view for SrO/TiO2-terminated step-terrace structure formed on SrTiO3 (001) single crystal surface 査読有り
utaro KATSUYAMA, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO
Journal of the Ceramic Society of Japan 131 巻 ( 5 ) 頁: 135 - 139 2023年5月
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Development of Cu–In–Ga–S quantum dots with a narrow emission peak for red electroluminescence 査読有り
Chang Jiang, Makoto Tozawa, Kazutaka Akiyoshi, Tatsuya Kameyama, Takahisa Yamamoto, Genichi Motomura, Yoshihide Fujisaki, Taro Uematsu, Susumu Kuwabata, Tsukasa Torimoto
Journal of Chemical Physics 158 巻 頁: 164708 2023年4月
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Microstructure and tensile strength of electrodeposited Fe-rich bcc FeCoNi medium-entropy alloy 査読有り
A. Watanabe, T. Yamamoto, R. Miyamoto, Y. Takigawa
Materials Science and Technology 2023年3月
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Non-uniformity of shrinkage rate as a function of current acceleration during flash event under voltage-to-current protocol in 8 mol%Y2O3–ZrO2 査読有り
M. Seko, S. Inagaki, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 132 巻 ( 3 ) 頁: 93 - 98 2023年3月
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Effect of Initial Grain Size on Crack Healing Behavior under DC Electric Field of Zirconia (8Y-CSZ) Ceramic 査読有り
S. Takahashi, K. Morita, K. Nambu, D. Terada, K. Kobayashi, T. Tokunaga, T. Yamamoto
Advanced Engineering Materials 頁: 220180 2023年2月
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Local crystallization of amorphous AlOx thin film using electron beam irradiation by SEM 査読有り
T. Tokunaga, S. Tanahashi, S. Okawara, T. Yamamoto
Materials Transactions 64 巻 ( 1 ) 頁: 184 - 190 2023年1月
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フラッシュ焼結技術の改良と実用化への展望 査読有り
山本 剛久
70 巻 頁: 18 - 29 2023年1月
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Shrinkage-rate controlled flash sintering for 3 - 10 mol%Y2O3-doped ZrO2 polycrystals 査読有り
M. KOIKE, A. KODARIA, T. TOKUNAGA, T. YAMAMOTO
Journal of the Ceramic Society of Japan 130 巻 ( 12 ) 頁: 906 - 912 2022年12月