A THEORETICAL-STUDY OF STRUCTURE AND ORDERING IN PB-BI MOLTEN ALLOYS

The solution of the Percus-Yevick (PY) equation for a binary mixture w ith a square well potential as a perturbation has been applied to the study of the Pb-Bi molten alloy system. The partial structure factors in the long wavelength limit is calculated and used to evaluate the lo ng wavelength limit of the concentration-concentration fluctuations S- cc(0). This has in turn been used to obtain the Warren-Cowley short ra nge order parameter alpha(1) and the chemical diffusion D. The calcula tions indicate compound forming tendencies in Ph-Bi molten alloys with greater magnitude at low atomic fraction of Bismuth.