Theoretical assessment on segregating nature of liquid In–Tl alloys

• In–Tl is a weakly interacting segregating system.
• Ordering energy parameter is temperature dependent.
• Tl atoms segregate in the surface in the whole range of concentration.
• There is a small positive deviation from linear law in viscosity isotherms.

We have used simple statistical theory to report the segregating nature of In–Tl liquid alloys. The energetic of mixing in liquid alloys has been analyzed through the study of surface properties, transport properties and various thermodynamic and microscopic functions. Positive deviation from Raoultian behavior has been observed in the computed mixing thermodynamic and microscopic parameters of the alloys. The computed results are in good agreement with experimental data and support a weak phase-separation tendency in molten In–Tl system. Surface properties have also been analyzed using two different approaches which reveal that with the addition of In atoms in In–Tl alloys, surface tension of the alloy increases and Tl atoms tend to segregate at the surface.