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

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 Delta T-x, T-rg, and gamma parameters. The T-rx parameter obtained under higher scanning rate exhibits better linear regression fit with glass forming ability (GFA). (c) 2005 Elsevier B.V. All rights reserved.