Thermodynamic behaviour of bulk metallic glasses

Abstract

The thermodynamic behaviour of bulk metallic glass forming melts have been studied by analyzing the temperature dependence of the Gibbs free energy difference ΔG, entropy difference ΔS and enthalpy difference ΔH between the undercooled melts and corresponding equilibrium solid phases. The study is made by calculating ΔG, ΔS and ΔH in the entire temperature range T m to T g for five samples Mg 65Cu 25Y 10, Cu 47Ti 34Zr 11Ni 8, Zr 46Cu 46Al 8, Zr 46(Cu 4.5/5.5Ag 1/1.5) 46Al 8, Zr 57Cu 15.4Ni 12.6Al 10Nb 5 and it is found that the calculated values of these thermodynamic parameters are very close to the experimental values, where T m and T g are melting temperature and glass transition temperature, respectively. © 2011 Elsevier B.V. All rights reserved.