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

Mondal, K.; Chatterjee, U. K.; Murty, B. S.
July 2003
Applied Physics Letters;7/28/2003, Vol. 83 Issue 4, p671
Academic Journal
This letter gives an approximation for the Gibb's free energy change for the crystallization of undercooled liquid (ΔG). The present ΔG expression is arrived at by the modification of existing models. Calculations based on the present expression have shown that the DG values obtained for seven glass forming alloys Au[sub81.4]Si[sub18.6], La[sub50]Al{sub30]Ni[sub20], Mg[sub65]Cu[sub25][subY]10, Mg[sub50]Ni[sub30]La[sub20], Pd[sub40]Ni[sub40]P[sub20],Zr[sub65]Cu[sub17.5]Ni[sub10]Al[sub7.5], and Zr[sub41.2]Ti[sub13.8]Cu[sub12.5]Ni[sub10]Be[sub22.5]) compare well with the experimental ones in all the cases with a maximum deviation of 6% up to the glass transition temperature (T[subg]). The present expression is able to calculate the ΔG 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[subrg] = T[subg] ⁄T[subm]) of 0.45–0.75.


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