MATHEMATICAL STUDY OF THE THERMODYNAMICS OF Cd-Na LIQUID ALLOY

R. R. Thapa
Page No. 18-21

The concentration dependent thermodynamic properties of cadmium-sodium liquid alloy are
interesting in many ways. The free energy of mixing, entropy of mixing and heat of mixing are quite
asymmetric about the equi-atomic composition. The phase diagram of Cd-Na alloy shows a wavy
liquidus line with a small hump around the stoichiometric composition. The quasi-lattice chemical
model is used for computation of its thermodynamic entities. The results explain the observed
asymmetry in the properties of mixing of Cd-Na liquid alloy around equi-atomic composition.
Key words: Binary alloy, Equi-atomic composition, Quasi-lattice model, Ordering energy, Free
energy of mixing, Entropy of mixing, Heat of mixing.