Free Energy of Mixing of some Binary Liquid Alloys

Authors

  • S.K. Chakrabarti Department of Physics, Tribhuvan University, M. M. A. M. Campus, Biratnagar
  • J.P. Yadav Department of Physics, Tilka Manjhi Bhagalpur University, Bhagalpur, Bihar
  • S.M. Rafique Department of Physics, Tilka Manjhi Bhagalpur University, Bhagalpur, Bihar

DOI:

https://doi.org/10.3126/jnphyssoc.v3i1.14449

Keywords:

Binary liquid alloy, Free energy of mixing, Strongly interacting system, Successive numerical approximations method

Abstract

Binary liquid alloys often show interesting behaviour as regards their thermodynamic properties. The heat of mixing often bears a large negative value and the entropy of mixing an S-shape. The free energy of mixing becomes asymmetric around the equi-atomic composition especially in case of complex forming alloys. In the present theoretical work we have tried to compute the free energy of mixing of some binary alloys e.g. lithium-lead, potassium amalgam and magnesium-tin―all in liquid state near their respective melting points. All these alloys form strongly interacting systems. So, we have applied Flory’s model which is a statistical mechanical model considering the size factor of the constituent species of a binary liquid alloy. We have ignored the interaction between the complex and each ingredient within an alloy and amended the formula accordingly. In the light of observed activity of a metal within an alloy we have ascertained the interchange energy by the method of successive numerical approximations and then calculated the free energy of mixing according to the said model for different concentrations of the ingredients. Our results explain the observed anomaly in the free energy of mixing of the present liquid alloys.

Journal of Nepal Physical Society Vol.3(1) 2015: 97-101

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Published

2016-01-28

How to Cite

Chakrabarti, S., Yadav, J., & Rafique, S. (2016). Free Energy of Mixing of some Binary Liquid Alloys. Journal of Nepal Physical Society, 3(1), 97–101. https://doi.org/10.3126/jnphyssoc.v3i1.14449

Issue

Vol. 3 No. 1 (2015)

Section

Articles

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