THE ROLE OF SIZE EFFECTS ON SURFACE-PROPERTIES

A theoretical model based on the grand partition function has been dev eloped to investigate the role of size effects on surface tension and surface segregation of liquid binary alloys. The necessary relation, w hich connects the surface composition with surface tension through ord er potential, surface coordination and volume ratio, is obtained. This has been applied to liquid Na-Cs alloys. Likewise bulk properties, su rface segregation and surface tension of Na-Cs liquid alloys are also affected appreciably by the size difference and are anomalous around C (Na) = 0.8.