Application of the modified electrostatic model to the impurity diffusion in nickel

Abstract

The modified electrostatic model (Neumann and Tolle 1995) is applied to the impurity diffusion in nickel. Z o = 0.4 is used for the effective charge of the nickel ion. The comparison of calculated and experimental diffusion parameters reveals that the sign of ΔQ, the difference between impurity diffusion and self-diffusion energy, and the sign of the difference between impurity diffusion and self-diffusion coefficient is correctly predicted in all cases. On the other hand the comparison exhibits some systematic deviations for 5p impurities, which cannot be explained in terms of the current impurity diffusion models.