Dislocation mechanism of deuterium retention in tungsten under plasma implantation

Research output: Contribution to journalArticle

Authors

Institutes & Expert groups

  • V. N. Karazin Kharkiv National University - Ukraine
  • Pacific Northwest National Laboratory
  • UGent - Universiteit Gent
  • PbPU - Peter the Great St.Petersburg Polytechnic University - Russia

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Abstract

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.

Details

Original languageEnglish
Article number395001
Number of pages10
JournalJournal of Physics: Condensed Matter
Volume26
Issue number39
DOIs
Publication statusPublished - 1 Oct 2014

Keywords

  • Deuterium retention, Dislocation mechanisms, Plasma implantation, retention

ID: 3751585