Analysis of the Cermak-Rothova method for determining the concentration dependence of ternary interdiffusion coefficients with a single diffusion couple

摘要

Dayananda's method for calculating the average ternary interdiffusion coefficient (D_(ij)~3.) using a single diffusion couple has recently been extended by Cermak and Rothova to determine the composition-dependent interdiffusion coefficients D_(ij)~3 in ternary systems based on the limitation of lim_(x_1-x_2)D_(ij)~3 = D_(ij)~3 in the distance interval . In the present paper, the authors argue that such a limitation is not applicable, and the so-called Cermak-Rothova approach cannot be used to obtain the "truly" composition-dependent interdiffusion coefficients.