Nucleation of He bubbles in amorphous FeBSi alloy irradiated with He ions
Nucleation of He bubbles in amorphous FeBSi alloy irradiated with He ions
复制标题
DOI：
10.1080/09500839.2012.693635
复制
发表时间：
2012-09
影响因子：
1.2
通讯作者：
Qiu Xu;Koichi Sato;T. Yoshiie
中科院分区：
文献类型：
--
作者：
Qiu Xu;Koichi Sato;T. Yoshiie
由于非晶态材料中不存在点缺陷，因此研究非晶态合金中氦气泡的形成是很有意义的。本文用透射电子显微镜研究了非晶态Fe79B16Si5合金经5keV He+离子辐照和150 eV He+离子注入而未引起位移损伤，然后在高温下退火后的组织演变。非晶态合金经5keV He+离子辐照后形成空位型缺陷，辐照后的样品在高温退火过程中形成He气泡。另一方面，对于注入150 eV He+离子的样品，尽管He原子也被俘获在自由体积中，但即使在873K，样品在退火过程中也没有观察到He气泡。因此，即使在非晶态合金中，He气泡的形成也与空位型缺陷的形成和迁移有关。
It is interesting to investigate the formation of He bubbles in amorphous alloys because point defects do not exist in amorphous materials. In the present study, the microstructural evolution of amorphous Fe79B16Si5 alloy, either irradiated with 5 keV He+ ions or implanted with 150 eV He+ ions without causing displacement damage, and then annealed at a high temperature, was investigated using transmission electron microscopy (TEM). Vacancy-type defects were formed in the amorphous alloy after irradiation with 5 keV He+ ions, and He bubbles formed during annealing the irradiated samples at high temperature. On the other hand, for samples implanted with 150 eV He+ ions, although He atoms are also trapped in the free volume, no He bubbles were observed during annealing the samples even up to 873 K. In conclusion, the formation of He bubbles is related to the formation and migration of vacancy-type defects even in amorphous alloys.