Defect annihilation at grain boundaries in alpha-Fe.
Defect annihilation at grain boundaries in alpha-Fe.
复制标题
DOI：
10.1038/srep01450
复制
发表时间：
2013
影响因子：
4.6
通讯作者：
Shao, Lin
中科院分区：
文献类型：
--
作者：
Chen, Di;Wang, Jing;Chen, Tianyi;Shao, Lin
了解铁基金属的辐射响应对于开发耐辐射钢以在恶劣的反应堆环境中实现更长和更安全的生命周期至关重要。纳米金属由于在晶界处的点缺陷复合而被探索为自修复材料。然而，基本的缺陷边界相互作用还没有很好地理解。我们发现，这种相互作用总是通过链状缺陷的形成和退火来介导的，链状缺陷由交替定位的晶格和空位组成。这些链状缺陷密切相关的缺陷形成能量最小值的晶界上，这取决于特定的边界配置的模式。通过链状缺陷，点缺陷有效地平移很大的距离，以与其相反物湮灭，因此晶界充当在极端辐射条件下不能饱和的高效缺陷汇。
Understanding radiation responses of Fe-based metals is essential to develop radiation tolerant steels for longer and safer life cycles in harsh reactor environments. Nanograined metals have been explored as self-healing materials due to point-defect recombination at grain boundaries. The fundamental defect-boundary interactions, however, are not yet well understood. We discover that the interactions are always mediated by formation and annealing of chain-like defects, which consist of alternately positioned interstitials and vacancies. These chain-like defects are closely correlated to the patterns of defect formation energy minima on the grain boundary, which depend on specific boundary configurations. Through chain-like defects, a point defect effectively translates large distances, to annihilate with its opposite, thus grain boundaries act as highly efficient defect sinks that cannot saturate under extreme radiation conditions.
登录
查看更多内容
影响因子：
8.6
作者：
Samaras, M;Derlet, PM;Victoria, M
通讯作者：
Victoria, M
影响因子：
64.8
作者：
de la Rubia, TD;Zbib, HM;Caturla, MJ
通讯作者：
Caturla, MJ
影响因子：
4.1
作者：
PLIMPTON, S
通讯作者：
PLIMPTON, S
影响因子：
56.9
作者：
Arakawa, K.;Ono, K.;Mori, H.
通讯作者：
Mori, H.
影响因子：
3.1
作者：
Singh, BN;Foreman, AJE;Trinkaus, H
通讯作者：
Trinkaus, H