Thermodynamic behaviour of bulk metallic glasses

Determination of accurate theoretical values for thermodynamic properties in bulk metallic glasses

“…Thus, most DC p values for the supercooled liquid regions of various BMGs are only rough approximations generated by fitting limited experimental data to the melting temperature, T m ; in the vicinity of the glass transition temperature T g : Because the accurate specific heat data in the supercooled region are notably absent, the functional dependences of DG; DS; and DH on temperature are generally estimated theoretically [5]. Several models for calculating DG; DS; and DH values have been previously proposed based on different expressions for DC p [6][7][8][9][10][11][12][13][14].…”

“…Recently, Dubey et al [7,8] proposed a theoretical expression for DC p based on the hole theory of the liquid state, thus calculating more accurate values for DG, DH, and DS from experimental results collected among the temperature range from T g to T m in the Zr 57 Cu 15.4 Ni 12.6 Al 10 Nb 5 BMG [8]. Furthermore, a hyperbolic expression for DC p was deduced that provided an optimal mathematical model for elucidating GFA based on the theoretical expression for DC p proposed by Dubey et al [7,8].…”

“…Furthermore, a hyperbolic expression for DC p was deduced that provided an optimal mathematical model for elucidating GFA based on the theoretical expression for DC p proposed by Dubey et al [7,8].…”

“…The deviations observed in thermodynamic parameters between experimental results and these three models [7,8,15] were comparatively evaluated.…”

“…The authors [15] previously proposed a hyperbolic expression for DC p based on the hole theory of the liquid state [7,8], shown as follows:…”