Thermodynamic properties of binary Al–Nd alloys

The mixing enthalpies of liquid alloys in the binary Al–Nd system are determined in the ranges 0 < x < 0.25 at 1500–1740 K, 0.4 < x < 0.64 at 1670–1740 K, and 0.64 < x < 1 at 1450–1500 K by isoperibol calorimetry. The melts of the binary Al–Nd system are characterized by significant negative mixing enthalpies: ΔHAl−Ndmin=−44.6kJ/mol at x = 0.34 and 1500 K (extrapolation to the overcooled melt region). Activities of components, entropies, Gibbs energies, and liquidus curve of the binary Al–Nd phase diagram are associated using the model of ideal associated solutions