Abstract
Zr-rich bulk metallic glasses (BMGs) exhibits exceptional combination of properties viz., high strength, better fracture toughness, and low young's modulus along with excellent corrosion and wear resistance. Prediction of glass forming ability (GFA) for Zr-rich systems in terms of alloy compositions is vital for appropriate material design. The present work attempts to predict good glass forming composition in Zr-Cu-Co-Al system by understanding the influence of thermodynamic parameter such as enthalpy of chemical mixing (ΔHchem) and topological factors such as mismatch entropy (ΔSσ/kB) and configurational entropy (ΔSconfig/R). The GFA parameter PHS, which is the product of ΔHchem and ΔSconfig/R is used to determine Zr-rich quaternary composition by weighing approach. Further, the correlation between PHS and critical diameter was established using reported data in Zr-Cu-Co-Al system.
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