Abstract
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.
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