Critical Cooling Rate Prediction by the Reduced Glass Temperature and Fragility Index

The reduced glass transition temperature ( T rg ) and fragility index ( m ) are both used to predict the critical cooling rate ( R c ). When either T rg or m is individually used to predict log 10 ( R c ), a large deviation occurrs in the prediction of log 10 ( R c ) because both of the corresponding correlations have low coefficients of determination ( R 2 ). The R 2 value increases from either 0.33 (by using only T rg ) or 0.68 (by using only m ) to 0.91 by using both T rg and m . Therefore, the glass‐forming ability (GFA) is estimated more accurately when T rg and m are both applied to predict log 10 ( R c ) through a binary linear regression analysis.