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.
|Number of pages||6|
|Journal||Applied Physics A: Materials Science and Processing|
|Publication status||Published - Jun 1997|
ASJC Scopus subject areas
- Materials Science(all)