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Analysis of thermodynamic parameters of glass forming metallic melts

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Abstract

The temperature dependence of the Gibbs free energy difference (ΔG) between the undercooled liquid and the corresponding equilibrium solid has been analysed for metallic glass forming systems in the frame of the expression obtained by expanding free energies of the undercooled liquid and solid phases in the form of Taylor's series expansion. The enthalpy difference (ΔH) and the entropy difference (ΔH) between the undercooled liquid and solid phases have also been analysed. The study is made for five different metallic glass forming materials, Au77Ge13.6Si9.4, Au53.2Pb27.5Sb19.3, Au81.4Si18.6, Mg85.5Cu14.5 and Mg81.6Ga18.4 and a very good agreement is found between calculated and experimental values of ΔG. The ideal glass transition temperature (T k) and the residual entropy (ΔS R) of these materials have also been studied due to their important role in assigning the glass formation ability of materials.

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Authors and Affiliations

  1. Department of Applied Physics, Institute of Technology, Banaras Hindu University, 221 005, Varanasi, India

    R. K. Mishra & K. S. Dubey

Authors
  1. R. K. Mishra
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  2. K. S. Dubey
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Additional information

The authors are grateful to Prof. P. Ramachandrarao, N. M. L. Jamshedpur and Prof. S. Lele, Department of Metallurgical Engineering, B. H. U. for their interest in the present work. The part of work was done under C. S. I. R. project and we are also thankful to C. S. I. R., New Delhi for financial support.

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Mishra, R.K., Dubey, K.S. Analysis of thermodynamic parameters of glass forming metallic melts. Journal of Thermal Analysis 50, 843–856 (1997). https://doi.org/10.1007/BF01979214

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  • DOI: https://doi.org/10.1007/BF01979214

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