Temperature threshold for preferential bubble formation on grain boundaries in tungsten under in-situ helium irradiation
Temperature threshold for preferential bubble formation on grain boundaries in tungsten under in-situ helium irradiation
复制标题
DOI：
10.1016/j.scriptamat.2020.01.013
复制
发表时间：
2020-04-01
影响因子：
6
通讯作者：
Maloy, S. A.
中科院分区：
文献类型：
--
作者：
El-Atwani, O.;Cunningham, W. S.;Maloy, S. A.
了解材料的辐射耐受性需要检查其在不同辐照条件下的性能。在这里，我们研究了在1073 K和1223 K的16 keV氦辐照钨原位氦泡损伤的辐射耐受性。损伤演化代表氦气泡密度，尺寸和总的变化，在晶粒基体和晶界的体积被量化为一个功能的注量。优先大气泡的形成和更高的体积变化的晶界上发生在1223 K，这表明某些氦空位复合物的迁移速度更快的扩散反应模型所证实的。由Elsevier Ltd代表Acta Materialia Inc.出版。
Understanding a material's radiation tolerance requires examining its performance under different irradiation conditions. Here, we investigate the radiation tolerance in terms of helium bubble damage in tungsten irradiated in-situ with 16 keV helium at 1073 K and 1223 K. Damage evolution represented by helium bubble density, size and total change in volume in the grain matrices and the grain boundaries are quantified as a function of fluence. Preferential large bubble formation and a higher change in volume on the grain boundaries occurred at 1223 K, suggesting faster migration of certain helium-vacancy complexes as confirmed by a diffusion-reaction model. Published by Elsevier Ltd on behalf of Acta Materialia Inc.