Enthalpies of mixing in ternary Ce–Cu–Sb liquid alloys

Abstract

Abstract The enthalpies of mixing in liquid alloys of the ternary Ce–Cu–Sb system were determined over a wide range of compositions by means of isoperibolic calorimetry at temperature 1300 K. Measurements were performed along five sections (x Cu/x Sb = 0.20/0.80; 0.40/0.60 and 0.60/0.40 for x Ce changed from 0 up to 0.35 and x Cu/x Ce = 0.20/0.80 and 0.60/0.40 for x Sb changed from 0 up to 0.25). The enthalpies of mixing in the ternary system were found to be exothermic and steadily increasing in absolute values from the binary constituent systems Ce–Cu and Cu–Sb towards the Ce–Sb boundary, reaching the minimum value of approximately –120 kJ · mol–1 in the vicinity of the phase CeSb.