Abstract
It is known that a reduction in the number of independent interdiffusivities and intrinsic diffusivities is possible if thermodynamic ideality of the (ternary) alloy is assumed or if the off-diagonal phenomenological coefficients are ignored. In the present letter we present a new analysis which shows generally, and exactly, that a reduction in the number of independent interdiffusivities and intrinsic diffusivities is always possible for ternary and higher alloys. In the general case, thermodynamic activities are also required.
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