Diffusion coefficients of Al in molten Zn in the temperature range relevant to the industrial applications of the Zn-Al alloy were experimentally measured using the long capillary technique. The diffusion coefficients were also predicted using four methods, including a predictive equation derived recently by the present authors, the Enskog expression, the so-called hole theory, and the fluid theory. In addition, molecular dynamics simulation was carried out in order to calculate the Al diffusivity. The experimentally measured Al diffusivity agreed well with the predicted values of the new derived equation and the outcomes of the molecular dynamics computation. An evaluation of the predictions of the four diffusion models favored the density fluctuation model.

Comprehensive Evaluation of Aluminum Diffusivity in Liquid Zinc. S.Yang, X.Su, J.Wang, F.Yin, N.Y.Tang, Z.Li, X.Wang, Z.Zhu, H.Tu, X.Li: Metallurgical and Materials Transactions A, 2011, 42[7], 1785-92