Microstructure change and swelling of helium irradiated beryllium

被引：12
|
作者：
Liu, P. P. [1 ]
Xue, L. W. [1 ]
Yu, L. P. [2 ]
Liu, J. L. [2 ]
Hu, W. [1 ]
Zhan, Q. [1 ]
Wan, F. R. [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Beijing Inst Aerosp Control Devices, Beijing 100854, Peoples R China
来源：
FUSION ENGINEERING AND DESIGN | 2019年 / 140卷
基金：
中国国家自然科学基金;
关键词：
Beryllium; Irradiation damage; Dislocation loop type; Helium bubble; Swelling; RESEARCH-AND-DEVELOPMENT; TEM; DESIGN;
D O I：
10.1016/j.fusengdes.2019.01.126
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Beryllium, as an outstanding nuclear metal, will be exposed to high-dose irradiation of high-energy neutrons during services in reactor, which will produce a large number of helium and significant irradiation damage resulting in extreme performance degradation. In this paper, microstructure change and swelling of helium irradiated beryllium have been investigated using transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM). Inside the grain, some impurity particles were observed and be revealed to be Fe/Al/Mn/Cr-rich beryllide phase with fcc structure. Beryllium metal was irradiated with 30 keV helium ion to a dose of 1 x 10(17) He+/cm(2) at room temperature. A high density of dislocation loop was induced in the sample after the irradiation. The types of loops in beryllium were summarized. Meanwhile, helium bubbles with average size of 2.7 nm were observed. Helium irradiation induced swelling and temperature effect were discussed.
引用
收藏
页码：62 / 66
页数：5
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