Dislocations mediate hydrogen retention in tungsten

In this letter, a comprehensive mechanism for the nucleation and growth of bubbles on dislocations under plasma exposure of tungsten is proposed. The mechanism reconciles long-standing experimental observations of hydrogen isotopes retention, essentially defined by material microstructure, and so fa...

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Bibliographic Details
Published in:Nuclear fusion 2014-04, Vol.54 (4), p.42004-5
Main Authors: Terentyev, D., Dubinko, V., Bakaev, A., Zayachuk, Y., Van Renterghem, W., Grigorev, P.
Format: Article
Language:English
Subjects:
Alloys
Assessments
Dislocations
hydrogen
Nuclear fusion
Nucleation
retention
Tungsten
Tungsten base alloys
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Summary:In this letter, a comprehensive mechanism for the nucleation and growth of bubbles on dislocations under plasma exposure of tungsten is proposed. The mechanism reconciles long-standing experimental observations of hydrogen isotopes retention, essentially defined by material microstructure, and so far not fully explained. Hence, this work provides an important link to unify material's modelling with experimental assessment of W and W-based alloys as candidates for plasma facing components.
ISSN:0029-5515
1741-4326
DOI:10.1088/0029-5515/54/4/042004