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ファイル
言語
英語
著者
網野 岳文 新日鐵住金(株) 先端技術研究所
荒河 一渡 島根大学大学院総合理工学研究科物理・材料科学領域
森 博太郎 大阪大学超高圧電子顕微鏡センター
内容記述(抄録等)
The dynamic behaviour of atomic-size disarrangements of atoms—point defects (self-interstitial atoms (SIAs) and vacancies)—often governs the macroscopic properties of crystalline materials. However, the dynamics of SIAs have not been fully uncovered because of their rapid migration. Using a combination of high-voltage transmission electron microscopy and exhaustive kinetic Monte Carlo simulations, we determine the dynamics of the rapidly migrating SIAs from the formation process of the nanoscale SIA clusters in tungsten as a typical body-centred cubic (BCC) structure metal under the constant-rate production of both types of point defects with high-energy electron irradiation, which must reflect the dynamics of individual SIAs. We reveal that the migration dimension of SIAs is not three-dimensional (3D) but one-dimensional (1D). This result overturns the long-standing and well-accepted view of SIAs in BCC metals and supports recent results obtained by ab-initio simulations. The SIA dynamics clarified here will be one of the key factors to accurately predict the lifetimes of nuclear fission and fusion materials.
掲載誌名
Scientific Reports
6
開始ページ
26099_1
終了ページ
26099_9
ISSN
20452322
発行日
2016-05-17
DOI
出版者
Nature Publishing
資料タイプ
学術雑誌論文
ファイル形式
PDF
権利関係
© The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
著者版/出版社版
出版社版
業績ID
e31571
部局
(旧組織)大学院総合理工学研究科