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Analysis of thermodynamic behaviour of bulk metallic glass forming melts and glass forming ability

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Abstract

The thermodynamic behaviour of bulk metallic glass (BMG) forming melts have been studied by analyzing the temperature dependence of the Gibbs free energy difference (∆G), entropy difference (∆S) and enthalpy difference (∆H)between the undercooled melt and the corresponding equilibrium solid phases. The study is made by calculating∆G, ∆S and ∆H in the entire temperature range T m (melting temperature) to T g (glass transition temperature) using the expressions obtained on the basis of Taylor’s series expansion. The entire analysis is made for La-based five samples of BMGs; La55Al25Ni20, La55Al25Ni15Cu5, La55Al25Ni10Cu10, La55Al25Ni5Cu15, and La55Al25Ni5Cu10Co5 and a comparative study is also performed between present results and results obtained in the framework of expressions proposed by earlier workers. An attempt has also been made to study the glass forming ability for BMGs.

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  1. Department of Applied Physics, Institute of Technology, Banaras Hindu University, Varanasi, 221005, India

    P. K. Singh & K. S. Dubey

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  1. P. K. Singh
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  2. K. S. Dubey
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Correspondence to K. S. Dubey.

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Singh, P.K., Dubey, K.S. Analysis of thermodynamic behaviour of bulk metallic glass forming melts and glass forming ability. J Therm Anal Calorim 100, 347–353 (2010). https://doi.org/10.1007/s10973-009-0011-x

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