Thermodynamic and surface properties of liquid Ti–Al–Fe alloy at different temperatures

ABSTRACT

Thermodynamic and surface properties of Ti-Al-Fe liquid ternary alloy have been assessed at temperatures 1873 K, 1973 K, 2073 K and 2173 K. The thermodynamic properties, such as activity have been studied using general solution model (GSM) and excess free energy of mixing has been studied using GSM, Kohler and Toop models. In surface properties, surface concentration has been computed using Butler’s equation and surface tension of the liquid alloy has been studied using all the four above mentioned models feeding the database of liquid Ti-Al, Al-Fe and Ti-Fe sub-binary systems. The values of surface tension computed using GSM and Toop model are in well agreement with each other at all concentrations. Moreover, the computed values of excess free energy of mixing and surface tension decrease at elevated temperatures from all corners and at all considered cross-sections indicating the decrease in mixing tendency of the alloy.

KEYWORDS:

• Ti-Al-Fe liquid alloy
• surface tension
• surface segregation
• r-K polynomial
• sub-binary system

Acknowledgements

Authors are grateful to University Grants Commission (UGC) Nepal for providing financial support to pursue this research work with grant FRG-S&T-73/74-14.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was partially supported by the University Grants Commission, Nepal [FRG-S&T-73/74-14].