Ion beam modifications of near-surface compositions in ternary alloys

N. Q. Lam, S. Tang, A. M. Yacout, L. E. Rehn, J. F. Stubbins

Research output: Contribution to journalArticlepeer-review

Abstract

Changes in the surface and subsurface compositions of ternary alloys during elevated-temperature sputtering with inert-gas ions were investigated. Theoretically, a comprehensive kinetic model which includes all the basic processes, such as preferential sputtering, displacement mixing, Gibbsian segregation, radiation-enhanced diffusion and radiation-induced segregation, was developed. This phenomenological approach enabled to predict the effects of each individual process or of a combination of processes on the compositional modification in model alloys. Experimentally, measurements of compositional changes at the surface of a Ag-(40 at.% Au)-(20 at.% Cu) alloy during 3 keV Ne+ bombardment at various temperatures were made, using ion scattering spectroscopy. These measurements were interpreted on the basis of the results of theoretical modeling.

Original languageEnglish (US)
Pages (from-to)889-892
Number of pages4
JournalNuclear Inst. and Methods in Physics Research, B
Volume59-60
Issue numberPART 2
DOIs
StatePublished - Jul 1 1991

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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