Determination of parameters of Cu surface mass transport on sapphire from morphological changes of beaded films caused by evaporation

I. Beszeda, D. L. Beke

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Abstract

Basic parameters of surface mass transport - the surface diffusion length of adatoms, λs, the surface diffusion coefficient, D′s, and the surface reaction rate coefficient, β′s, of Cu on alumina are determined in the temperature range 1048-1198 K. Measuring simultaneously the time dependence of the effective thickness, Heff(t), the lateral shift of the boundary, y(t) of beaded films (BF) and using vapour pressure data we concluded that the process is controlled by surface reaction at the perimeters of beads. Supposing Arrhenius-type temperature dependence for D′s, β′s and λs the activation energies and preexponential factors have been calculated.

Original languageEnglish
Pages (from-to)583-588
Number of pages6
JournalApplied Physics A: Materials Science and Processing
Volume64
Issue number6
DOIs
Publication statusPublished - Jun 1997

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ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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