After the investigation on the thermodynamic properties and mixing thermodynamic parameters of binary ho-mogeneous metallic melts involving compound, peritectic as well as solid solution, it was found that the equations of mix-ing free energy ΔGm and excess free energy ΔGxs of them can be expressed by the following equations:ΔGm = ∑x[∑NiΔGiθ + RT(∑ Nj ln Nj+∑Ni lnNi)] and ΔGxs = ΔGm-RT(alna+blnb), respectively.
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