Microscopic structure of CuSn compound forming binary molten alloys

279-282<span style="font-size:14.0pt;line-height: 115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" color:black;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">A simple statistical mechanical theory based on compound formation model (compound Aμβv formed by the preferential arrangement of A and B constituent atoms of the alloy AB, μA + vB = AμBv) has been used to investigate the phenomenon of compound formation in CuSn liquid alloys through the study of microscopic function in CuSn liquid alloys, i.e. concentration fluctuation in long wavelength region [Scc(o)] and chemical short range order parameter (α1). The study explains the observed asymmetry successfully and suggests the existence of Cu3Sn complex in the melt. The tendency of compound formation has been found to be weak. The system exhibits an ideal behaviour at Sn-rich end. The existence of inter-metallic compound Cu3Sn in the solid phase, which is manifested in the phase diagram, may be one of the factors for the anomalous behaviour of properties of mixing.