Formation of interstitial atoms in surface layers of helium-implanted tungsten

Using a method of field ion microscopy, the atomic structure of surface and near-surface layers of a perfect dislocation-free tungsten irradiated by helium ions with energies below the threshold of displacement was studied. We have found the output of tungsten atoms from the bulk as a result of thei...

Full description

Saved in:
Bibliographic Details
Published in:Technical physics letters 2013-11, Vol.39 (11), p.960-963
Main Authors: Dudka, O. V., Ksenofontov, V. A., Masilov, A. A., Sadanov, E. V.
Format: Article
Language:English
Subjects:
Classical and Continuum Physics
Physics
Physics and Astronomy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Using a method of field ion microscopy, the atomic structure of surface and near-surface layers of a perfect dislocation-free tungsten irradiated by helium ions with energies below the threshold of displacement was studied. We have found the output of tungsten atoms from the bulk as a result of their displacement from regular lattice positions occupied by implanted helium atoms and the formation of interstitial tungsten atoms. It is shown that high concentrations of helium and the presence of image forces have a considerable effect on the development of these processes. Depleted zones consisting of helium-vacancy complexes are revealed within the irradiated near-surface layer.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785013110035