Subsurface deuterium bubble formation in W due to low-energy high flux deuterium plasma exposure

TitleSubsurface deuterium bubble formation in W due to low-energy high flux deuterium plasma exposure
Publication TypeJournal Article
Year of Publication2017
AuthorsY.Z Jia, W. Liu, B. Xu, S.L Qu, L.Q Shi, T.W Morgan
JournalNuclear Fusion
Volume57
Issue3
Pagination034003
Type of ArticleLetter
Abstract

The deuterium (D) bubbles formed in W exposed to high flux D plasma were researched by scanning electron microscopy and transmission electron microscopy. After D plasma exposure at 500 K and 1000 K, a layer of nano-sized bubbles were homogenously distributed in W subsurface region. The D bubbles were homogenously nucleated due to the high D concentration, and the nucleation process is not related to the vacancy defects. At low temperature (500 K), D bubbles can grow by surface blistering, which caused different nano scale morphologies on different surfaces. At high temperature (1000 K), D bubbles mainly grow by vacancy clustering, which caused pinholes on the surface.

DOI10.1088/1741-4326/57/3/034003
Division

PSI

Department

PSI-E

PID

a1d37ca4b5a5a503b9a9c40a81d12fc8

Alternate TitleNucl. Fusion

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