Diffusion of cobalt in aluminium

Abstract

Using serial sectioning and residual activity techniques, the diffusion of co—60 in aluminium has been studied in the temperature range of 400–640°c, The temperature dependence of diffusivity could be expressed as

The results have been explained using an oscillating form of the inter-ion potential following the calculations given by LeClaire. This has further been extended to tracers like Mg, Fe, Cu, Zn, Ge and Ag. In all these cases except Ge and Ag it is seen that the activation energy is dominated by a large repulsive interaction at the saddle point. The results show a good agreement with the experiments on binding energies.