首页|Effect of tungsten deposition thickness on hydrogen isotope permeation through RAFM steel

Effect of tungsten deposition thickness on hydrogen isotope permeation through RAFM steel

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Deuterium (D) plasma-driven permeation (PDP) experiments through reduced activation ferritic/martensitic (RAFM) steel with and without tungsten (W) deposition layer have been performed. The results confirm that W deposition does not always work as D permeation barrier, but enhances D permeation flux through the structural material under certain conditions. The steady state PDP fluxes through RAFM steel with a thin (similar to 30 nm) W deposition layer have been found to be larger than those of bare RAFM steel, whereas the RAFM steel membrane with a thick (6.0 mu m) W deposition layer exhibits lower permeation fluxes than those of bare steel sample. Tritium Migration Analysis Program (TMAP) calculation indicates that the steady state permeation flux is determined by the D concentration accumulated at the interface between W layer and RAFM steel, which is highly relevant to the W deposition thickness. Only when the W thickness is larger than similar to 2 mu m, the steady state permeation flux will be controlled by diffusion in W deposition layer. (C) 2020 Elsevier B.V. All rights reserved.

TungstenRAFM steelHydrogen isotopePermeation

Liu, Hao-Dong、Zhou, Hai-Shan、Qiao, Li、Zhang, Hong、Luo, Guang-Nan

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Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China

Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China

2021

Journal of Nuclear Materials

Journal of Nuclear Materials

EISCI
ISSN:0022-3115
年,卷(期):2021.545
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