Papers - YAMAMOTO Takahisa

Optical and mechanical properties of rutile TiO2 subjected to AC flash processing Reviewed

Hiroshi Masuda, Tomoharu Tokunaga, Takahisa Yamamoto, Hidehiro Yoshida

Scripta Materialia   Vol. 246   page： 116088   2024.3

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DOI： https://doi.org/10.1016/j.scriptamat.2024.116088

Variation of grain boundary dihedral angles caused by voltage-to-current-based flash treatment in fully stabilized yttria-doped zirconia polycrystals Reviewed

M. Seko, S. Kayukawa, S. Inagaki, T. Tokunaga, T. Yamamoto

Journal of the Ceramic Society of Japan   Vol. 132 ( 2 ) page： 63 - 67   2024.2

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DOI： https://doi.org/10.2109/jcersj2.23170

Applying an alternating current to strontium titanate minimizes the change in oxidation state caused by flash sintering Reviewed

M. Seko, S. Inagaki, T. Tokunaga, S. Kobayashi, A. Nakamura, T. Yamamoto

Journal of the European Ceramic Society   Vol. 44   page： 2965 - 2971   2023.12

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DOI： https://doi.org/10.1016/j.jeurceramsoc.2023.12.046

One-pot synthesis of Ag–In–Ga–S nanocrystals embedded in a Ga2O3 matrix and enhancement of band-edge emission by Na+ doping Reviewed

M. Tozawa, C. Miyamae, K. Akiyoshi, T. Kameyama, T. Yamamoto, G. Motomura, Y. Fujisaki, T. Uematsu, S. Kuwabata, T. Torimoto

Nanoscale Advances   Vol. 5   page： 7057 - 7066   2023.11

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DOI： https://doi.org/10.1039/d3na00755c

Near-full compaction within only 30 min of total sintering time by shrinkage-rate-controlled flash sintering in 3 mol% Y2O3-doped ZrO2 polycrystal Reviewed

Yuki ISHINO, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO

Journal of the Ceramic Society of Japan   Vol. 131 ( 10 )   2023.10

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Improvements in Flash Sintering for Practical Application Reviewed

Takahisa YAMAMOTO

Materials Transactions   Vol. 64 ( 9 ) page： 2059 - 2068   2023.9

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DOI： 10.2320/matertrans.MT-Y2023003

StructuralDefectEffecton the ConcentrationQuenchingofTbxY2−xO3PhosphorThin Films Reviewed

Shizuka Suzuki, Takuro Dazai, Tomoharu Tokunaga, Takahisa Yamamoto, Ryuzi Katoh, Ryota Takahashi

J. Phys.Chem.C   Vol. 127   page： 9380 - 9387   2023.9

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DOI： 10.1021/acs.jpcc.3c01679

Apparent Sintering Activation Energy Estimated by Master Sintering Curves for 8 mol% Y2O3 Doped ZrO2 Polycrystals during Shrinkage-Rate Controlled Flash Sintering Reviewed

Masao KOIKE, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO

Materials Transactions   Vol. 64 ( 9 ) page： 2315 - 2320   2023.9

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DOI： 10.2320/matertrans.MT-M2023048

Hydrogarnet-Derived Porous Polyhedral Particles of SrFeO3-δ Perovskite Reviewed

H. Otaguro, T. Takeno, R. Sugimoto, S. Hosokawa, H. Akamatsu, T. Yamamoto, K. Nakanishi, K. Hayashi, G. Hasegawa

Chemistry Materials   Vol. 35   page： 6423 - 6436   2023.8

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DOI： https://doi.org/10.1021/acs.chemmater.3c01150

PromotingOxygenReductionReactionby ExcitationofLocalizedSurfacePlasmonof Shape-and Facet-ControlledOctahedralAu@PtCore-ShellNanocrystals Reviewed

Tatsuya Kameyama, Kentaro Sato, Takahisa Yamamoto, Mamoru Tamura, Takuya Iida, Tatsuya Shoji, Yasuyuki Tsuboi, Tsukasa Torimoto

ChemElectroChem   Vol. 10   page： e202300182   2023.7

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DOI： 10.1002/celc.202300182

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 Reviewed

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   Vol. 87 ( 7 ) page： 219 - 225   2023.7

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.2320/jinstmet.J2023001

Flash healing of Vickers microcracks formed on the (001) surface of cubic zirconia single crystals Reviewed

Shunsuke KAYUKAWA, Yutaro KATSUYAMA, Ayu KODAIRA, Tomoharu TOKUNAGA, Koji MORITA, Atsutomo NAKAMURA, and Takahisa YAMAMOTO

Journal of the European Ceramic Society   Vol. 43   page： 6272 - 6278   2023.6

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DOI： 10.1016/j.jeurceramsoc.2023.06.001

Scanning electron microscopy observation in wide field of view for SrO/TiO2-terminated step-terrace structure formed on SrTiO3 (001) single crystal surface Reviewed

utaro KATSUYAMA, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO

Journal of the Ceramic Society of Japan   Vol. 131 ( 5 ) page： 135 - 139   2023.5

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DOI： 10.2109/jcersj2.23011

Development of Cu–In–Ga–S quantum dots with a narrow emission peak for red electroluminescence Reviewed

Chang Jiang, Makoto Tozawa, Kazutaka Akiyoshi, Tatsuya Kameyama, Takahisa Yamamoto, Genichi Motomura, Yoshihide Fujisaki, Taro Uematsu, Susumu Kuwabata, Tsukasa Torimoto

Journal of Chemical Physics   Vol. 158   page： 164708   2023.4

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DOI： 10.1063/5.0144271

Microstructure and tensile strength of electrodeposited Fe-rich bcc FeCoNi medium-entropy alloy Reviewed

A. Watanabe, T. Yamamoto, R. Miyamoto, Y. Takigawa

Materials Science and Technology     2023.3

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/02670836.2023.2187973

Non-uniformity of shrinkage rate as a function of current acceleration during flash event under voltage-to-current protocol in 8 mol%Y2O3–ZrO2 Reviewed

M. Seko, S. Inagaki, T. Tokunaga, T. Yamamoto

Journal of the Ceramic Society of Japan   Vol. 132 ( 3 ) page： 93 - 98   2023.3

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DOI： https://doi.org/10.2109/jcersj2.23179

Effect of Initial Grain Size on Crack Healing Behavior under DC Electric Field of Zirconia (8Y-CSZ) Ceramic Reviewed

S. Takahashi, K. Morita, K. Nambu, D. Terada, K. Kobayashi, T. Tokunaga, T. Yamamoto

Advanced Engineering Materials     page： 220180   2023.2

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DOI： 10.1002/adem.202201807

Local crystallization of amorphous AlOx thin film using electron beam irradiation by SEM Reviewed

T. Tokunaga, S. Tanahashi, S. Okawara, T. Yamamoto

Materials Transactions   Vol. 64 ( 1 ) page： 184 - 190   2023.1

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DOI： doi.org/10.2320/matertrans.MT-N2022004

フラッシュ焼結技術の改良と実用化への展望 Reviewed

山本 剛久

  Vol. 70   page： 18 - 29   2023.1

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DOI： 10.2479/jjspm.70.18

Shrinkage-rate controlled flash sintering for 3 - 10 mol%Y2O3-doped ZrO2 polycrystals Reviewed

M. KOIKE, A. KODARIA, T. TOKUNAGA, T. YAMAMOTO

Journal of the Ceramic Society of Japan   Vol. 130 ( 12 ) page： 906 - 912   2022.12

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DOI： doi.org/10.2109/jcersj2.22114