Effect of rhenium on defects evolution behavior in tungsten under irradiation
Effect of rhenium on defects evolution behavior in tungsten under irradiation
The influence of the transmutation element rhenium (Re) on defect evolution in tungsten (W) during irradiations with heavy ions and deuterium (D) plasma was investigated. Rolled W and W–5Re alloy (Re concentration 5 wt.%) were irradiated with 500 keV iron ions to 0.06 and 0.6 dpa (displacement per a...
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Personal Name(s): | Wang, Zheng |
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Gao, Liang (Corresponding author) / Zhu, Xiu-Li / Yuan, Yue / Wang, Shiwei / Cheng, Long / Lu, Guang-Hong | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Nuclear fusion, 61 (2021) 3, S. 036037 - |
Imprint: |
Vienna
IAEA
2021
|
DOI: |
10.34734/FZJ-2021-05656 |
DOI: |
10.1088/1741-4326/abd920 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wand-Wechselwirkung |
Link: |
Restricted OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1088/1741-4326/abd920 in citations.
The influence of the transmutation element rhenium (Re) on defect evolution in tungsten (W) during irradiations with heavy ions and deuterium (D) plasma was investigated. Rolled W and W–5Re alloy (Re concentration 5 wt.%) were irradiated with 500 keV iron ions to 0.06 and 0.6 dpa (displacement per atom), and deuterium plasma at 38 eV/D to a fluence of 2.2 × 1025 D m−2 at ∼373 K. The results of Doppler broadening spectroscopy by the positron annihilation technique indicate that more or larger vacancy-type defects were produced in W than in the W–5Re during Fe ion irradiation, suggesting the important role of Re on inhibiting the migration and/or clustering of vacancies. The much smaller and shallower blistering in W–5Re than in W after the same D plasma exposure points to the pinning effects on dislocations by Re. The total retained D amounts in W–5Re and W materials are comparable, but with very different concentration profile at corresponding depth. This is explained by the blister formation exerting influence on the D inward diffusion. Demonstrating the important role of Re on the defect evolution in W under irradiation, the present work provides an enhanced understanding on the possible effects of neutron irradiation on the performance of plasma-facing materials in future fusion devices. |