TY  - JOUR
AU  - Wang, Zheng
AU  - Gao, Liang
AU  - Zhu, Xiu-Li
AU  - Yuan, Yue
AU  - Wang, Shiwei
AU  - Cheng, Long
AU  - Lu, Guang-Hong
TI  - Effect of rhenium on defects evolution behavior in tungsten under irradiation
JO  - Nuclear fusion
VL  - 61
IS  - 3
SN  - 0029-5515
CY  - Vienna
PB  - IAEA
M1  - FZJ-2021-05656
SP  - 036037 -
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000621485700001
DO  - DOI:10.1088/1741-4326/abd920
UR  - https://juser.fz-juelich.de/record/904086
ER  -