Surface properties of the molten Al-Mg alloys

Author(s): I.Koirala, I.S.Jha, B.P.Singh

Simple statisticalmodel has been used to report the thermodynamic, structural, transport and surface properties of liquidAl-Mg alloys at 1073K. In thermodynamic properties we have studied the free energy of mixing and the chemical activity of both components of the alloys. For the structural investigation, our study includes concentration fluctuation in longwave length limit andWarren-Cowley short range order parameter.Viscosity and diffusivity of the alloys have been studied to understand transport properties. The surface behavior has been analyzed by computing surface concentration and surface tension of the alloys. The structural behaviors of the alloys are found to be symmetric with respect to concentrations of the species. The computed results are in good agreement with experimental data. Positive deviation of viscosity isotherms from linear law is observed. Surface tension of the alloys is found to be smaller than ideal values throughout bulk concentration ofAl. For all theoretical analysis, concentration independent energy parameter takes important role, which is found to be temperature dependent.

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