Thermodynamic Approach for Predicting the Glass Forming Ability of Amorphous Alloys

摘要

In the present study, a new thermodynamic calculation scheme based on CALPHAD approach to predict the composition dependency of GFA in multicomponent alloy systems has been proposed. Driving forces of formation for crystalline phases under undercooled liquid states are calculated to define the composition with a local minimum of the driving forces as the one with the highest GFA. It has been shown that the calculated results are in good agreement with the experimentally obtained compositional dependencies of GFA. The driving force criterion proposed in this study can be used as a simple calculation scheme to search a multicomponent alloy composition with high GFA for the development of bulk amorphous alloys.