Gibb's free energy for the crystallization of glass forming liquids

This letter gives an approximation for the Gibb's free energy change for the crystallization of undercooled liquid (DeltaG). The present DeltaG expression is arrived at by the modification of existing models. Calculations based on the present expression have shown that the DeltaG values obtained for seven glass forming alloys (Au81.4Si18.6, La50Al30Ni20, Mg65Cu25Y10, Mg50Ni30La20, Pd40Ni40P20, Zr65Cu17.5Ni10Al7.5, and Zr41.2Ti13.8Cu12.5Ni10Be22.5) compare well with the experimental ones in all the cases with a maximum deviation of 6% up to the glass transition temperature (T-g). The present expression is able to calculate the DeltaG values accurately in a variety of glass forming alloys ranging from binary to quinary systems with a wide range of reduced glass transition temperature (T-rg=T-g/T-m) of 0.45-0.75. (C) 2003 American Institute of Physics.