Abstract
The recently developed Arrhenius formula of a modified Sutherland equation was employed to calculate the self– and impurity diffusivities in liquid Sn, Ag, In and Sb. The reliability of the calculated self– and impurity diffusivities was validated by comparing the presently calculated results with the critically reviewed literature data. Based on the reliable tracer and chemical diffusivities available in the literature, the atomic mobility parameters in Sn–Ag–In and Sn–Ag–Sb melts were then evaluated with the aid of the available thermodynamic descriptions for the liquid phase. Comprehensive comparisons show that most of the measured and theoretical diffusivities in Sn–Ag–In and Sn–Ag–Sb melts can be reasonably reproduced by the currently obtained atomic mobilities. Moreover, the atomic mobilities were further verified by comparing the model–predicted concentration profiles with the measured ones in various liquid Sn–Ag–Sb diffusion couples.
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