Dislocation mechanism of deuterium retention in tungsten under plasma implantation

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 experimentall...

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Published inJournal of physics. Condensed matter Vol. 26; no. 39; p. 395001
Main Authors Dubinko, V I, Grigorev, P, Bakaev, A, Terentyev, D, van Oost, G, Gao, F, Van Neck, D, Zhurkin, E E
Format Journal Article
LanguageEnglish
Published England IOP Publishing 01.10.2014
Subjects
Alloy development
Alloys - chemistry
Computer Simulation
Condensed matter
Crystal defects
Deuterium
Deuterium - chemistry
Dislocations
Implantation
Mathematical models
Models, Molecular
Models, Theoretical
plasma
retention
tungsten
Tungsten - chemistry
Tungsten base alloys
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Summary: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.
Bibliography:JPCM-101799.R1
ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/26/39/395001