Surface morphology and deuterium retention in tungsten exposed to high flux D plasma at high temperatures

TitleSurface morphology and deuterium retention in tungsten exposed to high flux D plasma at high temperatures
Publication TypeJournal Article
Year of Publication2015
AuthorsY.Z Jia, G. De Temmerman, G.N Luo, H.Y. Xu, C. Li, B.Q Fu, W. Liu
JournalJournal of Nuclear Materials
Volume457
Pagination213 - 219
Date PublishedFeb
Abstract

Surface modifications and deuterium retention induced in tungsten by high fluxes (1024 m−2 s−1) low energy (38 eV) deuterium ions were studied as a function of surface temperature. Blister formation was studied by scanning electron microscopy and electron backscatter diffraction, while deuterium retention was measured by thermal desorption spectroscopy. Blisters are observed on the surface exposed at different temperatures, ranging from 493 K to 1273 K. The blister density and D retention decrease with the increasing exposure temperature. The formation of blisters at high temperatures is attributed to the high flux of D plasma. At 943 K, with the increasing fluence, there is trend to the saturation of D retention and blister density. The defects caused by plasma exposure have an important effect on the D trapping and blistering behavior. The formation of blisters has a strong relationship with slipping system of tungsten.

DOI10.1016/j.jnucmat.2014.11.079
Division

PSI

Department

PSI-E

PID

bed3eb50ea51b94167972a405f387b2e

Alternate TitleJ. Nucl. Mater.

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