Coupled motion of grain boundaries in bcc tungsten as a possible radiation-damage healing mechanism under fusion reactor conditions
Coupled motion of grain boundaries in bcc tungsten as a possible radiation-damage healing mechanism under fusion reactor conditions
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DOI：
10.1088/0029-5515/53/6/063001
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发表时间：
2013-06-01
期刊：
影响因子：
3.3
通讯作者：
Voter, Arthur F.
中科院分区：
文献类型：
--
作者：
Borovikov, Valery;Tang, Xian-Zhu;Voter, Arthur F.
钨作为一种潜在的第一壁聚变材料，将承受高辐射通量和极高的机械应力。我们提出，在这些条件下，耦合晶界运动（在某些情况下由间隙加载增强）可以导致辐射损伤愈合机制，其中大应力激活耦合晶界运动，当晶界穿过材料时，晶界会清除诸如空洞和空位等缺陷。为了研究这种情况的可能性，研究人员研究了钨中许多gb的应力诱导迁移特性。
As a potential first-wall fusion reactor material, tungsten will be subjected to high radiation flux and extreme mechanical stress. We propose that under these conditions, coupled grain boundary ( GB) motion, in some cases enhanced by interstitial loading, can lead to a radiation-damage healing mechanism, in which a large stress activates coupled GB motion, and the GB sweeps up the defects, such as voids and vacancies, as it passes through the material. The stress-induced mobility characteristics of a number of GBs in tungsten are examined to investigate the likelihood of this scenario.