Microscopic Structure And Thermodynamical Investigation Of Compound Forming Binary Liquid Alloy Cu - Sn

Abstract

The symmetry observed in the properties of mixing of Cu-Sn liquid alloys is discussed on the basis of a simple theory based on the complex formation model. This has been used to evaluate the pair potential and entropy of mixing of Cu-Sn liquid alloys as a function of concentration. The band structure energy has been used to obtain an expression for interionic pair potential (Φ ij ) which in turn is used to obtain the hard sphere diameter (σ) of Cu-Sn liquid alloys. The results suggest that the metallic constituents of the alloys undergo major structural change on alloying. The entropy of mixing of Cu-Sn liquid alloys show anomalous behaviour due to preferential ordering of unlike atoms as nearest neighbour.