Abstract
Thermodynamic properties of ternary liquid Al–Ge–Sn alloys have been studied by electromotive force (e.m.f.) technique with a liquid electrolyte at the temperature range from T=(1050 to 1250) K. The results of the e.m.f. examination were compared with our calorimetric as well as with literature e.m.f. data and a good agreement was observed. The comprehensive description of thermodynamic properties of liquid Al–Ge–Sn alloys was performed. Tin-rich alloys have positive deviations whereas germanium-rich alloys have negative deviations from ideal solutions for aluminium. The difference between experimental and calculated by the Bonnier geometric model Δ mix G xs values is positive and reaches an extremum of 1.06 kJ · mol −1. Positive values of integral excess entropy of mixing at x Al>0.25 can be attributed to a non-configuration contributions.
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