Blistering and Helium Retention of Tungsten and 5% Chromium Doped Tungsten Exposed to 60keV Helium Ions Irradiation
Shu-qin Lv1 , Wen-jia Han1 , Jian-gang Yu1 , Hang Zhou1 , Mi Liu1,2 , Chang-an Chen3 , Kai-gui Zhu1,2**
1 Department of Physics, Beihang University, Beijing 1001912 Beijing Key Laboratory of Advanced Nuclear Energy Materials and Physics, Beihang University, Beijing 1001913 Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621907
Abstract ：Pure tungsten (W) and chromium doped W (W-5%Cr) are prepared by powder metallurgy. The microstructure, blistering and helium retention are investigated by x-ray diffraction, scanning electron microscopy, transmission electron microscopy and thermal desorption spectroscopy (TDS). These results show that the average size and density of helium blisters on the surface of pure W are much larger than those on the W-5%Cr alloy. Vacancy-impurity pairs can reduce the migration coefficients of vacancy and vacancy-helium complexes, and Cr may play a role of such an impurity. Moreover, the TDS result shows that the highest desorption peak moves to higher temperature, which is attributed to the He$_{m}$Cr$_{k}$V$_{n}$ complexes in the W-Cr alloy. In addition, the helium retention is found to be higher in W than in W-5%Cr.
收稿日期: 2018-07-18
出版日期: 2018-11-23
:
61.66.Dk
(Alloys )
61.05.-a
(Techniques for structure determination)
65.90.+i
(Other topics in thermal properties of condensed matter)
28.52.Fa
(Materials)
52.40.Hf
(Plasma-material interactions; boundary layer effects)
引用本文:
. [J]. 中国物理快报, 2018, 35(12): 126101-.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/35/12/126101
或
https://cpl.iphy.ac.cn/CN/Y2018/V35/I12/126101
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2018, Vol. 35 
