Thermodynamic properties of liquid Fe-Sc alloys

The partial and integral mixing enthalpies of Fe-Sc melts are determined by calorimetry at 1873 K over the entire composition range. It is established that the minimum enthalpy of mixing is -12.4 ± 0.6 at x = 0.46 and the first partial enthalpies of mixing are Δ {H} {Sc} -43.8\pm 4.4 Δ {H}-{\mathrm{Fe}}^{\infty }=-38.1\pm 3.8 (kJ/mol). Thermodynamic properties of the Fe-Sc melts are calculated with the model of ideal associated solutions. It is found that the activities of components have negative deviations from parameters of ideal solutions