A Quasi-lattice Model for the Thermodynamic Properties of Au-Zn Liquid Alloys

Abstract

The quasi-lattice model developed by Bhatia and Singh^1–2 has been applied to understand the alloying behaviour of Au[sbnd]Zn liquid alloys. The large negative values of ordering energy and chemical short range order parameter indicate heterocoordination in Au[sbnd]Zn melt. The dip in concentration fluctuations in long wavelength limit and larger negative value of excess free energy of mixing at C = 1/2 suggest the existence of 1–1 type of complexes (AuZn) in the liquid alloys. This makes us believe that Au[sbnd]Zn liquid alloys with symmetrical properties of mixing belong to strong interacting system.

Key Words:

• Short range order parameter
• binary alloys