Abstract
The surface tension and the viscosity of the liquid system Ag–In–Sn are calculated by using the thermodynamic activities as input data. Both quantities exhibit highly non-linear variations with the concentration. The surface tension is discussed in terms of the deviations of the long-wavelength limit of the concentration–concentration fluctuations S cc(0) from ideality with special emphasis on the equiatomic section c In/c Sn = 1. The marked deviations found for hint at the increased segregation of Ag-atoms from the surface into the bulk for c Ag<0.5 and the recovered tendency to stay on the surface at compositions c Ag > 0.5. The results on are also included in the discussion. The viscosity exhibits negative deviations from ideality following the very particular variation of the excess free energy of mixing with the composition which is also the characteristic feature of the binary Ag-based systems.
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