Size effects in surface segregation

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25 Citations (Scopus)

Abstract

The effect of the slab thickness (d) on the segregation behavior has been investigated for a phase separating system in a slab consisting of atomic planes parallel to the free surfaces. The calculations were carried out using the Fowler-Guggenheim approximation in the monolayer limit. It is shown, that by varying the surface fraction ξ, a surface phase transition can occur, similar to a semi-infinite system where a change in temperature can lead to a phase transition (S-shaped segregation isotherm). Furthermore, the existence of a minimum on the free energy curve versus d was examined. It was demonstrated that such a minimum can exist in the nanocrystalline region.

Original languageEnglish
Pages (from-to)3021-3027
Number of pages7
JournalJournal of Applied Physics
Volume83
Issue number6
DOIs
Publication statusPublished - Mar 15 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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