Thermodynamic Properties of Binary In–Ni Alloys

The mixing enthalpies of liquid binary In–Ni alloys (0.85 < x Ni < 1) at 1800 K were determined by isoperibol calorimetry. The thermodynamic properties of the In–Ni alloys were calculated for the entire composition range using the model of ideal associated solutions. The thermodynamic activities of melt components show negative deviations from the ideal behavior. The mixing enthalpies are characterized by moderate exothermic effects. The minimum mixing enthalpy of the melts is –12.0 ± 0.1 kJ/mol at x Ni = 0.59.