title: Dislocation mechanism of deuterium retention in tungsten under plasma implantation.
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.
authors.affiliation: National Science Center 'Kharkov Institute of Physics and Technology', Kharkov 61108, Ukraine.
authors.forename: V I
authors.initials: VI
authors.lastname: Dubinko
authors.forename: P
authors.initials: P
authors.lastname: Grigorev
authors.forename: A
authors.initials: A
authors.lastname: Bakaev
authors.forename: D
authors.initials: D
authors.lastname: Terentyev
authors.forename: G
authors.initials: G
authors.lastname: van Oost
authors.forename: F
authors.initials: F
authors.lastname: Gao
authors.forename: D
authors.initials: D
authors.lastname: Van Neck
authors.forename: E E
authors.initials: EE
authors.lastname: Zhurkin
mesh_terms: D000497:Alloys / Q000737:chemistry*; D003198:Computer Simulation; D003903:Deuterium / Q000737:chemistry*; D008958:Models, Molecular; D008962:Models, Theoretical; D014414:Tungsten / Q000737:chemistry*
chemical_list: D000497:Alloys; D003903:Deuterium; D014414:Tungsten