%0 Journal Article
%A Wang, Zheng
%A Gao, Liang
%A Zhu, Xiu-Li
%A Yuan, Yue
%A Wang, Shiwei
%A Cheng, Long
%A Lu, Guang-Hong
%T Effect of rhenium on defects evolution behavior in tungsten under irradiation
%J Nuclear fusion
%V 61
%N 3
%@ 0029-5515
%C Vienna
%I IAEA
%M FZJ-2021-05656
%P 036037 -
%D 2021
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000621485700001
%R 10.1088/1741-4326/abd920
%U https://juser.fz-juelich.de/record/904086