Cooperative mixing induced surface roughening in bilayer metals: A possible novel surface damage mechanism

P. Süle, M. Menyhárd, K. Nordlund

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Molecular dynamics simulations have been used to study a collective atomic transport phenomenon by repeated Ar+ irradiations in the Ti/Pt interfacial system. The ion-induced injection of surface atoms to the bulk, the ejection of bulk atoms to the top layers together with surface erosion is strongly enhanced by interfacial mixing. This process leads to a dense interfacial material, and broadening of the interface region. The process scales with the relative difference of the atomic masses. We find that surface roughening and interfacial mixing is strongly coupled via an enhanced counterflow material transport normal to the surface which might be a novel surface damage mechanism. This cooperative phenomenon is active when the bilayer system is subjected to a high dose ion irradiation (multiple ion irradiations) and leads to surface cavity growth.

Original languageEnglish
Pages (from-to)525-532
Number of pages8
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume222
Issue number3-4
DOIs
Publication statusPublished - Aug 1 2004

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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