Dislocations mediate hydrogen retention in tungsten
Dislocations mediate hydrogen retention in tungsten
Terentyev, D.; Dubinko, V.; Bakaev, A.; Zayachuk, Y.; van Renterghem, W.; Grigorev, P.
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.
Keywords: hydrogen isotopes; retention; tungsten; ab initio; DFT; rate theory
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Nuclear Fusion 54(2014), 042004
DOI: 10.1088/0029-5515/54/4/042004
Cited 104 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-21336