Alloying behaviour of molten Ni–Pt and Al–Ge alloys

Abstract

We have used Flory's model to compute free energy of mixing (G M), concentration fluctuation in long-wavelength limit (S CC(0)), Warren–Cowely short-range order parameter () and ratio of mutual and intrinsic-diffusion coefficients (D M/D id) for Ni–Pt liquid alloy at 1625 K and Al–Ge alloy at 1200 K. All of these computed parameters have been found to be in a very good agreement with observed values for both of these alloys. The analysis suggests that Ni–Pt alloy in the liquid state is a strongly interacting system while Al–Ge alloy in the liquid state is a moderately interacting system. Both of the alloys are found to be heterocoordinating systems.