Dislocation mechanism of deuterium retention in tungsten under plasma implantation

Vladimir I. Dubinko, Petr Grigorev, Alexander Bakaev, Dmitry Terentyev, Guido Van Oost, F. Gao, Dimitri Van Neck, Evgeni E. Zhurkin

    Research outputpeer-review


    We have developed a new theoretical model for deuterium (D) retention in tungsten-based alloys on the basis of its being trapped at dislocations and transported to the surface via the dislocation network with parameters determined by ab initio calculations. The model is used to explain experimentally observed trends of D retention under sub-threshold implantation, which does not produce stable lattice defects to act as traps for D in conventional models. Saturation of D retention with implantation dose and effects due to alloying of tungsten with, e.g. tantalum, are evaluated, and comparison of the model predictions with experimental observations under high-flux plasma implantation conditions is presented.
    Original languageEnglish
    Article number395001
    Number of pages10
    JournalJournal of Physics: Condensed Matter
    Issue number39
    StatePublished - 1 Oct 2014

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