Critical Properties of Segregation for Al₁−xBixLiquid Binary Alloys

Critical properties of segregation for Al1−xBix liquid binary alloys are studied systematically using both static and dynamic effects. The static method involves thermodynamics of mixing such as energy of mixing, enthalpy of mixing and entropy of mixing. The dynamic effects are obtained from the properties of shear viscosity and diffusion coefficient. Both static and dynamic properties are evaluated by employing a self-consistent microscopic theory that involves the electronic theory of metals and statistical mechanics. The liquid structure is described by using the thermodynamic perturbation theory known as Linearized Weeks–Chandler–Andersen (LWCA) theory. Both static and dynamic properties are calculated on the same footing. Agreement between theory and experiment for different thermodynamic properties of mixing are found to be excellent. Theoretically derived critical temperature and critical concentration of segregation are also found to be reasonably good in agreement with experiment. Most importantly, dynamic properties bear a clear indication of segregation.