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すぐ身につく分析化学・機器分析の実務 : 基礎、前処理、手法選択、記録作成を現場目線で解説
矢矧 束穂, 瀬戸山 央( 担当: 単著)
日刊工業新聞社 2020年 ( ISBN:9784526080456 )
記述言語:日本語 著書種別:学術書
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Ma, BH; Yahagi, T; Tatami, J; Iijima, M
ACS SUSTAINABLE CHEMISTRY & ENGINEERING 13 ( 24 ) 9044 - 9052 2025年6月
記述言語:日本語 掲載種別:研究論文(学術雑誌) 共著
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Yahagi, T; Ohji, T; Yamaguchi, H; Takahashi, T; Nakano, H; Iijima, M; Tatami, J
ADVANCED ENGINEERING MATERIALS 26 ( 18 ) 2024年9月
記述言語:日本語 掲載種別:研究論文(学術雑誌) 共著
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Yahagi Tsukaho, Ohji Tatsuki, Yamaguchi Hiroshi, Takahashi Takuma, Iijima Motoyuki, Tatami Junichi, … 全著者表示
Yahagi Tsukaho, Ohji Tatsuki, Yamaguchi Hiroshi, Takahashi Takuma, Iijima Motoyuki, Tatami Junichi, Nakano Hiromi 閉じる
ADVANCED ENGINEERING MATERIALS 26 ( 18 ) 2024年9月
記述言語:英語 掲載種別:研究論文(学術雑誌) 出版者・発行元:Wiley 共著
In this study, the deformation behaviors and mechanical properties of 4H-SiC single crystals are investigated using microcantilever beam specimens with two different sizes, A and B (A < B). Tensile stress is applied along <1120> direction. Plastic deformation, or nonlinearity, is observed in the stress–strain curves, and yield stress, or proportional limit, coincides between the two specimens at ≈25 ± 2 GPa. Scanning transmission electron microscopy and transmission electron microscopy studies show that the plastic deformation is due to dislocation activities; multiple-dislocation pileup areas are observed in both the specimens. Assuming {1100}/<1120> prismatic slip which most plausibly occurs in the <1120> stress application, the critical resolved shar stress is estimated to be 10.9 GPa, which agrees well with the previous studies. Measured fracture strength is 41.9 ± 2.8 and 33.5 ± 2.4 GPa for the A and B, respectively. Dislocation–fracture relationship is discussed on the basis of dislocation-based fracture mechanics, etc. It is suggested that cracks form within the multiple-dislocation pileup area, by interaction with dislocation pileups, and act as fracture origins. A's strength is close to an ideal tensile strength of 4H-SiC in the <1120> direction, 47–55 GPa.
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Microscopic mechanical properties of silicon nitride ceramics corroded in sulfuric acid solution
Tatami, J; Uda, M; Takahashi, T; Yahagi, T; Iijima, M; Matsui, K; Ohji, T; Nakano, H
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 44 ( 9 ) 5415 - 5421 2024年8月
記述言語:日本語 掲載種別:研究論文(学術雑誌) 共著
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Micro-scale mechanical properties of surface layer in ion-exchanged glass
Fujita, S; Ohji, T; Yahagi, T; Iijima, M; Tatami, J
JOURNAL OF THE AMERICAN CERAMIC SOCIETY 107 ( 6 ) 3666 - 3672 2024年6月
記述言語:日本語 掲載種別:研究論文(学術雑誌) 共著