Observation of ε′-Ag17Mg54 phase induced by plasma immersion ion implantation

Lubov Burlaka, Larisa Kutsenko, Michael Talianker, David Fuks, Arik Kiv, Ian Brown

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This paper provides a confirmation of the effectiveness of the recently suggested ab initio approach to the theoretical prediction of phase transformations which may be induced in metallic alloys by metal plasma immersion and ion implantation processing. The approach is based on an assumption that at certain concentrations of the implanted species, the relaxation of the exited electronic state of the implanted structure should be accompanied by the rearrangement of atoms leading to the formation of a new phase. Recently, on the basis of density functional theory calculations of the energetic characteristics of the electronic subsystems of the implanted Mg-Ag system, it was predicted that concentrations of the implanted Ag ions within the range from ∼18 to 23 at% Ag, favor transition to the phase ε′-Ag17Mg54. Our transmission electron microscopy observations and electron diffraction analysis of the Mg-based alloy subjected to the implantation of Ag ions at dose of ∼5×1015 ion/cm2 confirmed that the formation of the ε′-Ag 17Mg54 phase indeed takes place.

Original languageEnglish
Pages (from-to)631-635
Number of pages5
JournalRadiation Effects and Defects in Solids
Volume168
Issue number9
DOIs
StatePublished - 8 Apr 2013

Keywords

  • DFT theory
  • ion implantation
  • transmission electron microscopy

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Materials Science (all)
  • Condensed Matter Physics

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