The diffusion coefficients of transition elements (Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn) and non-transition elements (Mg, Si, Ga, Ge) in face-centered cubic and liquid Al were assessed by means of the least-squares method and semi-empirical correlations. Inconsistent experimental data were ruled out. In the case of elements for which plentiful experimental data were available, the least-squares analysis yielded activation energies and pre-exponential factors for the Arrhenius equation. For elements with limited, or no, data, the diffusion parameters were estimated using 2 semi-empirical correlations. In one correlation, the logarithmic pre-exponential factors were plotted against the activation energies for various elements. In the other correlation, the activation energies were obtained as a function of the valence relative to Al. The diffusion coefficients which were calculated by using the estimated diffusion parameters agreed reasonably well with reliable experimental data. The proposed semi-empirical correlations were used to predict the diffusion coefficients of elements in liquid Al. Satisfactory agreement between the predicted and measured diffusion coefficients was found.

Diffusion Coefficients of Some Solutes in FCC and Liquid Al - Critical Evaluation and Correlation. Y.Du, Y.A.Chang, B.Huang, W.Gong, Z.Jin, H.Xu, Z.Yuan, Y.Liu, Y.He, F.Y.Xie: Materials Science and Engineering A, 2003, 363[1-2], 140-51