Thermodynamic analysis of the stable and metastable Co-Cu and Co-Cu-Fe phase diagrams

The binary Co-Cu and the ternary Co-Cu-Fe systems have been optimized using the CALPHAD approach. Experimental data that have appeared recently in the literature have been used to improve the description of the metastable miscibility gap on both binary and ternary liquid phases. In the Co-Cu-Fe system, ternary parameters have been obtained to properly describe the miscibility gap. A significant improvement with respect to previous thermodynamic descriptions has been achieved. A set of model parameters for the liquid, f.c.c., and b.c.c. phases is given.