Theoretical prediction and experimental evaluation of glass forming ability, density and equilibrium point of Ta based bulk metallic glass alloys

The present investigation aims at evaluating the Glass Forming Ability (GFA), density (ρ) and equilibrium melting point (T0) of Ta(W/Hf)-Ni-B based bulk metallic glass (BMG) alloy system. Initially, the theoretical GFA, based on thermodynamic parameters PHSS, ρth, based on rule of mixture of volume and T0th, using Thermo-cal software for all alloy systems have been calculated and then mapped in Ta-Ni-B, Ta(W)-Ni-B and Ta(Hf)-Ni-B diagrams respectively. Maps for individual alloy system were then superimposed based on high GFA ( 13 g/cc) and low melting point (