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Deformation Behavior and Fracture Strength of Single-Crystal 4H-SiC Determined by Microcantilever Bending Tests
http://hdl.handle.net/10131/0002001047
http://hdl.handle.net/10131/00020010472b7d5185-c7f9-46fe-9ded-3456e308f551
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Adv Eng Mater - 2024 - Yahagi - Deformation Behavior and Fracture Strength of Single‐Crystal 4H‐SiC Determined by.pdf (5 MB)
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Supplemental Data.pdf (518 KB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||||||||||
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| 公開日 | 2024-07-25 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| タイトル | Deformation Behavior and Fracture Strength of Single-Crystal 4H-SiC Determined by Microcantilever Bending Tests | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 言語 | ||||||||||||||||||
| 言語 | eng | |||||||||||||||||
| 資源タイプ | ||||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||
| 資源タイプ | journal article | |||||||||||||||||
| アクセス権 | ||||||||||||||||||
| アクセス権 | open access | |||||||||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||||||||||
| 著者 |
Yahagi, Tsukaho
× Yahagi, Tsukaho
× Ohji, Tatsuki
ORCID
0000-0002-4880-9138
× Yamaguchi, Hiroshi
× Takahashi, Takuma
ORCID
0009-0005-7568-3787
× Nakano, Hiromi
× Iijima, Motoyuki
× Tatami, Junichi |
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| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||
| 内容記述 | 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. | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| bibliographic_information |
en : ADVANCED ENGINEERING MATERIALS 巻 26, 号 18, ページ数 9, 発行日 2024-09 |
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| item_2_source_id_9 | ||||||||||||||||||
| 収録物識別子タイプ | EISSN | |||||||||||||||||
| 収録物識別子 | 15272648 | |||||||||||||||||
| item_2_source_id_11 | ||||||||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||||||||
| 収録物識別子 | AA11558667 | |||||||||||||||||
| item_2_relation_13 | ||||||||||||||||||
| 関連タイプ | isIdenticalTo | |||||||||||||||||
| 識別子タイプ | DOI | |||||||||||||||||
| 関連識別子 | https://doi.org/10.1002/adem.202400095 | |||||||||||||||||
| 出版タイプ | ||||||||||||||||||
| 出版タイプ | VoR | |||||||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||||||
| 出版者 | ||||||||||||||||||
| 出版者 | Wiley | |||||||||||||||||
| item_1724376541206 | ||||||||||||||||||
| 助成機関名 | Japan Science and Technology Agency (JST) | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 研究課題番号URI | https://projectdb.jst.go.jp/grant/JST-PROJECT-21460437/ | |||||||||||||||||
| 研究課題番号 | JPMJCR2192 | |||||||||||||||||
| 研究課題番号タイプ | JGN | |||||||||||||||||
| 研究課題名 | 劣化の学理に基づくセラミックスの信頼性革新 | |||||||||||||||||
| 言語 | ja | |||||||||||||||||
