Thermochemical investigation of Sm-Mg alloys

The paper focuses on the thermochemical behaviour of the binary Sm-Mg alloys. The enthalpies of formation of the Sm-Mg intermetallic compounds have been determined at 300 K by high temperature direct synthesis calorimetry. The following results in kJ/mole of atoms are reported: -18.5±2 (SmMg), -16.0±2 (SmMg2), -12.0±2 (SmMg3), -8.5±2 (SmMg5) and -5.5±2 (Sm5Mg41). The results are compared with the earlier experimental value obtained by vapour pressure.