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

Basic Information:

DOI：https://doi.org/10.1007/s40436-013-0040-3

Chinese Library Classification Number:

Citation Information:

Deviation values of specific heat difference $$ Updelta C_{ m p},$$ the Gibbs free energy difference $$ Updelta G , $$ enthalpy difference $$ Updelta H , $$ and entropy difference $$ Updelta S $$ between the supercooled liquid and corresponding crystalline phase produced by the linear, hyperbolic, and Dubey’s expressions of $$ Updelta C_{ m p}$$ and the corresponding experimental values are determined for sixteen bulk metallic glasses (BMGs) from the glass transition temperature $$ T_{ ext{g}} $$ to the melting temperature $$ T_{ ext{m}}. $$ The calculated values produced by the hyperbolic expression for $$Updelta C_{ m p}$$ most closely approximate experimental values, indicating that the hyperbolic $$Updelta C_{ m p}$$ expression can be considered universally applicable, compared to linear and Dubey’s expressions for $$ Updelta C_{ m p},$$ which are accurate only within a limited range of conditions. For instance, Dubey’s $$Updelta C_{ m p}$$ expression provides a good approximation of actual experimental values within certain conditions (i.e., $$ xi = Updelta C_{ m p}^{ m g}/Updelta C_{ m p}^{ m m}< 2 , $$ where $$Updelta C_{ m p}^{ m g}$$ and $$Updelta C_{ m p}^{ m m}$$ represent the specific heat difference at temperatures $$ T_{ ext{g}} $$ and $$ T_{ ext{m}} , $$ respectively).