Prediction of composition dependency of glass forming ability of Mg-Cu-Y alloys by thermodynamic approach

A simple thermodynamic calculation scheme has been proposed to predict the composition dependency of glass forming ability (GFA) in the Mg-Cu-Y ternary alloys. 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. The calculated results are in good agreement with the experimental results.