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Investigation of instability of M23C6 particles in F82H steel under electron and ion irradiation conditions
https://repo.qst.go.jp/records/74935
https://repo.qst.go.jp/records/749356a208f5c-c50e-4242-bf48-0fbd6b7586a7
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-03-25 | |||||
| タイトル | ||||||
| タイトル | Investigation of instability of M23C6 particles in F82H steel under electron and ion irradiation conditions | |||||
| 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 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Kano, Sho
× Kano, Sho× Yang, Huilong× Shen, Jingjie× Zhao, Zishou× McGrady, John× 濱口, 大× 安堂, 正己× 谷川, 博康× Abe, Hiroaki× Hamaguchi, Dai× Ando, Masami× Tanigawa, Hiroyasu |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In order to clarify the instability of M23C6 in F82H steel under irradiation, both electron irradiation using a high voltage electron microscope (HVEM) and ion irradiation using an ion accelerator were performed. For the electron irradiation, in-situ observation under 2 MV electron irradiation and ex-situ high resolution electron microscopic (HREM) analysis were utilized to evaluate the response of M23C6 against irradiation. The temperature dependence of the irradiation induced instability of the carbide was first confirmed: 293 K < T < 573 K, by observation of lowering in contrast at the periphery of carbides, 698 K < T < 773 K, fragmentation at the interface between carbides and matrix, and at 773 K, formation and coarsening of new particles near the periphery of M23C6. HREM analysis showed the loss of the lattice fringe contrast at the pre-existing M23C6 precipitates at temperatures ranging from 473 to 773 K, indicating severe loss of crystallinity due to dissolution of the constituent atoms though irradiation- enhanced diffusion under the vacancy diffusion by the focused electron beam irradiation. For the ion irradiation, 10.5MeV-Fe3+ ion was applied to bombard the F82H steel at 673K to achieve the displacement damage of 20 dpa at the depth of 1.0 µm from surface. Cross-section TEM specimens were prepared by a focused ion beam technique. The shrinkage of carbide particles was observed especially near the irradiation surface. Besides, the lattice fringes at the periphery of carbide were observed in the irradiated M23C6 by the HREM analysis, which is different from that observed in the electron irradiation. It was clarified that the instability of M23C6 is dependent on the irradiation conditions, indicating that the flow rate of vacancy type defects might be the key factor to cause the dissolution of constituent atoms of carbide particles into matrix under irradiation. | |||||
| 書誌情報 |
Journal of Nuclear Materials 巻 502, p. 263-269, 発行日 2018-02 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0022-3115 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.jnucmat.2018.02.004 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1016/j.jnucmat.2018.02.004 | |||||
