Thermodynamic modeling of the Pd-X (X= Ag, Co, Fe, Ni) systems

A set of self-consistent thermodynamic model parameters is presented to des cribe the phase equilibria of the Ag-Pd, Co-Pd, Fe-Pd, and Ni-Pd systems. I n most cases, the calculated values using the optimized model parameters ag ree very well with the experimental data. The FePd and FePd3 phases with la rge homogeneity ranges are described by the compound energy formalism, At p resent, insufficient thermodynamic data are available for these two phases. Therefore, experimental data on the heat of formation and/or the first-pri nciple calculation of cohesive energies will be very useful for further ref inement of thermodynamic parameters of FePd and FePd3 phases.