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Simulation study of helium bubble coalescence in tungsten at various temperatures relevant to fusion conditions
http://hdl.handle.net/10655/00012977
http://hdl.handle.net/10655/00012977ad09a507-df76-4450-b7cb-662b715bc6c2
名前 / ファイル | ライセンス | アクション |
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Comput.Mat.Sci.187_pp110076 (1.2 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-02-03 | |||||
タイトル | ||||||
タイトル | Simulation study of helium bubble coalescence in tungsten at various temperatures relevant to fusion conditions | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Molecular dynamics | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Plasma facing materials | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Helium implantation | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Bubble interaction | |||||
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 | |||||
著者 |
ZHAN, Jie
× ZHAN, Jie× OKITA, Taira× YE, Minyou× KATO, Daiji× SUZUKI, Katsuyuki |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Molecular dynamics (MD) methods are used to study nanosized helium (He) bubble coalescence process in tungsten (W) at various temperatures relevant to fusion conditions, on an atomistic scale. Bubble coalescence in W is observed at a higher temperature and He/V ratio, while the calculated internal bubble pressure due to virial stress increases with the increase in the He/V ratio; bubble coalescence is significantly dependent on the bubble distance. In these MD simulations, coalescence occurs, only when the surface distance between the two bubbles is equal to 1a0, where a0 denotes the lattice constant and is approximately 0.317 nm at 2100 K. On the other hand, a bubble diameter between 1a0 and 3a0 may have relatively limited effect on the coalescence, although larger-sized bubbles may have higher migration energy. Local stress profile calculated indicates that initial bubbles can interact with each other, which may enhance the He atoms diffusion between bubbles and their coalescence. Physical contact at the initial stage of coalescence may occur between two nearby bubbles accompanied by W lattice distortion because of the limited displacement of W atoms near the bubbles and rapid migration of He atoms within the two bubbles. These results are beneficial for understanding the evolution of He bubbles in bulk W. | |||||
書誌情報 |
Computational Materials Science 巻 187, p. 110076, 発行日 2021-02 |
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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 | 09270256 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10854948 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.commatsci.2020.110076 | |||||
権利 | ||||||
権利情報 | © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://doi.org/10.1016/j.cryogenics.2022.103419 | |||||
情報源 | ||||||
関連名称 | Jie Zhan, Taira Okita, Minyou Ye, Daiji Kato, Katsuyuki Suzuki, Simulation study of helium bubble coalescence in tungsten at various temperatures relevant to fusion conditions, Computational Materials Science, Volume 187, 2021, 110076, ISSN 0927-0256, https://doi.org/10.1016/j.commatsci.2020.110076. | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.commatsci.2020.110076 | |||||
関連名称 | Publisher version | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
NAIS | ||||||
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