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Blistering and Helium Retention of Tungsten and 5% Chromium Doped Tungsten Exposed to 60 keV Helium Ions Irradiation.
- Source :
-
Chinese Physics Letters . Dec2018, Vol. 35 Issue 12, p1-1. 1p. - Publication Year :
- 2018
-
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 HemCrkVn complexes in the W-Cr alloy. In addition, the helium retention is found to be higher in W than in W-5%Cr. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HELIUM
*TUNGSTEN
*CHROMIUM
*DOPING agents (Chemistry)
*MICROSTRUCTURE
Subjects
Details
- Language :
- English
- ISSN :
- 0256307X
- Volume :
- 35
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Chinese Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 133403442
- Full Text :
- https://doi.org/10.1088/0256-307X/35/12/126101