Heating and cooling rate dependence of the parameters representing the glass forming ability in bulk metallic glasses

Abstract

A GFA (glass-forming ability) indicator, reduced crystallization temperature ( T rx), has been suggested based on the consideration of both resistance of the amorphous phase against crystallization and stability of the under-cooled liquid against competing crystalline phase formation. The T rx parameter exhibits the best correlations with critical thickness ( Z c) and critical cooling rate ( R c) for glass formation when compared with those of Δ T x, T rg, and γ parameters. The T rx parameter obtained under higher scanning rate exhibits better linear regression fit with glass forming ability (GFA).