A Study of Diffusion in Aluminum-Rich Alloys of Aluminum, Zinc and Copper by Activation Analysis

Abstract

In this thesis, a theoretical study of certain properties of the diffusion coefficient matrix in a multicomponent system has been carried out. The ratio of the off-diagonal diffusion coefficient to the on-diagonal diffusion coefficient in a dilute ternary substitutional system has been evaluated theoretically. The effect of the second solute gradient on the diffusivity of the first one in a ternary substitutional solid solution has been experimentally determined using the neutron activation analysis technique.