Calorimetric investigations of liquid Bi–In–Zn alloys

The integral enthalpies of mixing of liquid Bi–In–Zn alloys were determined at 500 °C by a drop calorimetric technique using a Calvet-type microcalorimeter. The ternary liquid miscibility gap in the Bi–In–Zn system at 500 °C was confirmed and determined by the calorimetric method for the first time. The three binary interaction parameters and the ternary interaction parameters were optimized based on the Redlich–Kister–Muggianu model. Good agreement between the experiments and calculations based on several extrapolation models was achieved for all measured cross-sections except inside the miscibility gap.