Abstract

Diffusivity of Ag 110 in AgZn and AgCd alloys containing about 30% Zn or Cd was measured by means of surface counting. The results show that the silver atoms diffuse most rapidly in the lattice of AgZn and that the diffusivity of silver in AgCd is still higher than that in silver itself. These facts are interpreted by considering that the cohesive energy of the metallic lattice is affected by the addition of the impurity atoms not only due to the screening effect of the valence electrons but also, due to the change of the repulsive interaction of closed shells.

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