Determination of parameters of surface mass transport of Ni on sapphire from the kinetics of morphological change of beaded films caused by evaporation

I. Beszeda, D. L. Beke, Zs Tókei, G. Erdélyi

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Basic parameters of surface mass transport of Ni on alumina - the surface diffusion length of adatoms, λs, the surface diffusion coefficient, Ds' and the surface reaction rate coefficient, βss' are determined in the temperature range 1298-1443 K. Measuring simultaneously the time dependence of the effective thickness, H eff(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 of Ds', βs' and λs the activation energies and preexponential factors have been calculated.

Original languageEnglish
Pages (from-to)1527-1534
Number of pages8
JournalDefect and Diffusion Forum
Volume143-147
DOIs
Publication statusPublished - Jan 1 1997

    Fingerprint

Keywords

  • Beaded film (BF)
  • Surface diffusion
  • Surface reaction

ASJC Scopus subject areas

  • Radiation
  • Materials Science(all)
  • Condensed Matter Physics

Cite this