Blister formation on tungsten surface under low energy and high flux hydrogen plasma irradiation in NAGDIS-I

This study presents experimental results on hydrogen blister formation on powder metallurgy tungsten (PM-W) surface under low energy (10 21 m −2 s −1) hydrogen plasma irradiation in a divertor plasma simulator-NAGDIS-I. The tungsten samples were exposed to steady-state hydrogen plasma at various sam...

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Bibliographic Details
Published in:Journal of nuclear materials 2003-03, Vol.313, p.72-76
Main Authors: Ye, M.Y., Kanehara, H., Fukuta, S., Ohno, N., Takamura, S.
Format: Article
Language:English
Subjects:
Bubble and blister formation
Divertor plasma simulator
Hydrogen plasma
Plasma–surface interaction
Tungsten
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Summary:This study presents experimental results on hydrogen blister formation on powder metallurgy tungsten (PM-W) surface under low energy (10 21 m −2 s −1) hydrogen plasma irradiation in a divertor plasma simulator-NAGDIS-I. The tungsten samples were exposed to steady-state hydrogen plasma at various sample temperatures and fluences. Hydrogen blister formations are clearly observed on tungsten surface at the surface temperature below 950 K. The blister size is from a few 10 μm to a few 100 μm. It was found that the blister formations obviously depend on the surface temperature and the incident hydrogen ion fluence. No blisters are observed on tungsten surface at the surface temperature above 950 K even if the fluence is high enough.
ISSN:0022-3115
1873-4820
DOI:10.1016/S0022-3115(02)01349-1