Transition from segregating to ordering in AgSb liquid alloys at 1250 K

The transition from segregating to ordering in AgSb liquid alloys at 1250 K has been analyzed in the framework of quasi-lattice model. The analytical expressions have been derived for the thermodynamic and structural functions on assuming the existence of chemical complexes in the liquid alloys near the melting temperature. The theoretical values of the excess free energy of mixing, free energy of mixing, activity, entropy of mixing, heat of mixing and concentration fluctuations in the long wavelength limit for AgSb liquid alloys at 1250 K have been compared with the corresponding experimental values and found to be in well agreement. The concentration dependence of heat of mixing and concentration fluctuations show the transition from segregating to ordering in AgSb liquid alloys at 1250 K. Further, the concentration dependence of the short-range order parameter and diffusivity ratio also exhibit the transition from segregating to ordering in AgSb liquid alloys at 1250 K.