Influence of lattice misfit on diffusion coefficients in thin films polycrystalline Pd-Ag and Pd-Au systems

The dependence of effective interdiffusion coefficients versus the misfit of the parameters of crystalline lattices of film and substrate for double polycrystalline thin films of Pd-Ag and Pd-Au systems has been studied with the use of X-ray analysis. Silver, gold, Pd-Ag and Pd-Au alloys were used as substrates. Palladium was used as a film. The magnitude of the misfit was changed with the use of a Pd concentration change in the substrate. It was established that the decrease of misfit from 4.9 to 0.94% leads to subsidence of the effective diffusion coefficients in Pd film more than several orders of magnitudes. (C) 2002 Elsevier Science B.V. All rights reserved.