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.