Heat capacity of liquid Al–La–Ni alloys

Abstract

The heat capacity of liquid Al–La–Ni alloys was measured using an adiabatic calorimeter. The heat capacities C p( x, T) exhibit large temperature and composition dependences. The results indicate the existence of a maximum in the C p( T)-curve in the undercooled melt. An association model was applied to calculate the thermodynamic mixing functions of ternary liquid Al–La–Ni alloys using the model parameters of the three limiting binary systems and assuming an additional ternary association reaction. The calculations show a good agreement with the experimental enthalpy of mixing and the C p( x, T)- data.