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 H-chem) as thermodynamic, mismatch entropy (Delta S-sigma/k(B)) as topological and configurational entropy (Delta S-config/R) as statistical parameters were studied. The product of Delta H-chem and Delta S-sigma/k(B) which is termed as Delta P-HS in the Delta S-config/R range of 0.9 to 1.0 can be strongly correlated to glass forming ability. Using the contributions of Delta P-HS 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.