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000904086 1001_ $$00000-0001-7063-9844$$aWang, Zheng$$b0
000904086 245__ $$aEffect of rhenium on defects evolution behavior in tungsten under irradiation
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000904086 520__ $$aThe influence of the transmutation element rhenium (Re) on defect evolution in tungsten (W) during irradiations with heavy ions and deuterium (D) plasma was investigated. Rolled W and W–5Re alloy (Re concentration 5 wt.%) were irradiated with 500 keV iron ions to 0.06 and 0.6 dpa (displacement per atom), and deuterium plasma at 38 eV/D to a fluence of 2.2 × 1025 D m−2 at ∼373 K. The results of Doppler broadening spectroscopy by the positron annihilation technique indicate that more or larger vacancy-type defects were produced in W than in the W–5Re during Fe ion irradiation, suggesting the important role of Re on inhibiting the migration and/or clustering of vacancies. The much smaller and shallower blistering in W–5Re than in W after the same D plasma exposure points to the pinning effects on dislocations by Re. The total retained D amounts in W–5Re and W materials are comparable, but with very different concentration profile at corresponding depth. This is explained by the blister formation exerting influence on the D inward diffusion. Demonstrating the important role of Re on the defect evolution in W under irradiation, the present work provides an enhanced understanding on the possible effects of neutron irradiation on the performance of plasma-facing materials in future fusion devices.
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000904086 7001_ $$0P:(DE-Juel1)184620$$aGao, Liang$$b1$$eCorresponding author$$ufzj
000904086 7001_ $$0P:(DE-HGF)0$$aZhu, Xiu-Li$$b2
000904086 7001_ $$0P:(DE-Juel1)166383$$aYuan, Yue$$b3
000904086 7001_ $$00000-0002-5635-0785$$aWang, Shiwei$$b4
000904086 7001_ $$00000-0002-3537-784X$$aCheng, Long$$b5
000904086 7001_ $$00000-0002-3039-1706$$aLu, Guang-Hong$$b6
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