Thermodynamic, surface and transport properties of ternary Al–Sn–Zn liquid alloy and its sub binaries

ABSTRACT

The excess free energies of sub-binary Al–Sn, Sn–Zn and Zn–Al alloys and ternary Al–Sn–Zn alloy were computed using the optimised exponential parameters of R–K polynomial at 973, 1073, 1173 and 1273 K. The computed values of free energy of mixing, enthalpy of mixing and activity of the ternary alloy were compared with the available experimental data. The surface concentrations of the monomers of the ternary Al–Sn–Zn alloy were computed using Butler model. The surface tension of the ternary liquid alloy was calculated in the framework of Chou, Kohler, Toop and Bulter models using optimised parameters for the excess surface tension. The viscosity of the sub-binary systems have been computed using Kaptay equation with the help of calculated results of enthalpy of mixing, and the viscosity of the ternary alloy were computed in the framework of Chou, Kohler and Toop model using optimised parameter for the excess viscosity.

KEYWORDS:

• R–K polynomial
• glass-forming nature
• exponential parameters
• surface tension
• viscosity

Acknowledgement

D. Adhikari is grateful to University Grants Commissions (UGC), Nepal for providing financial support to pursue this research (Grant no, FRG-S&T-73/74-14).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by University Grants Commission- Nepal: [Grant Number FRG-S&T-73/74-14].