Thermodynamic modeling of Zr-Ti-Cu-Ni-Be bulk metallic glass

In the present thermodynamic model, the optimization of bulk metallic glass forming compositions in Zr-Ti-Cu-Ni-Be system using enthalpy of chemical mixing (Delta;Hchem) as thermodynamic, mismatch entropy (Delta;S σ/kB) as topological and configurational entropy (Delta;Sconfig/R) as statistical parameters were studied. The product of ΔHchem and ΔSσ/kb which is termed as ΔPhs in the ΔSConfig/R range of 0.9 to 1.0 can be strongly correlated to glass forming ability. Using the contributions of ΔPHS values of all ternary compositions possible in Zr-Ti-Cu-Ni-Be system, the final quinary composition is designed. Composition obtained from present model was found to closely match with compositions reported in literature. © 2009 TIIM, India.