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language
eng
Author
Amino, Takafumi Advanced Technology Research Laboratories, Nippon Steel & Sumitomo Metal Corporation
Arakawa, Kazuto Department of Materials Science, Faculty of Science and Engineering, Shimane University
Mori, Hirotarou Research Centre for Ultra-High Voltage Electron Microscopy, Osaka University
Description
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.
Journal Title
Scientific Reports
Volume
6
Start Page
26099_1
End Page
26099_9
ISSN
20452322
Published Date
2016-05-17
DOI
Publisher
Nature Publishing
NII Type
Journal Article
Format
PDF
Rights
© 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/
Text Version
出版社版
Gyoseki ID
e31571
OAI-PMH Set
Interdisciplinary Graduate School of Science and Engineering