The evolution of micro defects in He+ irradiated FeCrNi alloy during isochronal annealing
The evolution of micro defects in He+ irradiated FeCrNi alloy during isochronal annealing
复制标题
He辐照FeCrNi合金等时退火过程中微缺陷的演变
DOI：
10.1016/j.nimb.2015.04.055
复制
发表时间：
2015-08-01
影响因子：
1.3
通讯作者：
Wang, Baoyi
中科院分区：
文献类型：
--
作者：
Lu, Eryang;Cao, Xingzhong;Wang, Baoyi
为了研究He ~+辐照FeCrNi模型合金的显微组织演变，在室温下，以1 × 10 ~（15）ions/cm ~（2）的注量将140 keV的He ~+离子注入FeCrNi模型合金。用正电子湮没谱研究了423 ~ 873 K等时退火过程中微缺陷的演化。在573 ~ 623 K温度范围内，S参数的减小与未被氦原子俘获的空位团簇的湮灭有关。而在773 ~ 823 K之间，损伤区S参数的下降可能是由于HenVm团簇的解离所致。游离的空位团不稳定，迅速湮灭，降低了空位缺陷的浓度。(C)2015 Elsevier B. V.版权所有。
In order to study the microstructural evolution of the He+ irradiated FeCrNi model alloy, 140 keV He+ ions were implanted into the specimen with the fluence of 1 x 10(15) ions/cm(2) at room temperature. Positron annihilation spectroscopy was used to characterize the evolution of micro defects during isochronal annealing between 423 and 873 K. The decrease of the S parameter between 573 and 623 K has been associated to the annihilation of vacancy clusters, which were not trapped by helium atom. While the decline of the S parameter between 773 and 823 K in the damage region might be caused by the dissociation of HenVm clusters. The dissociated vacancy clusters were unstable and annihilated rapidly, which decreases the concentration of vacancy defects. (C) 2015 Elsevier B.V. All rights reserved.