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Effect of lithium-ion irradiation on the crystallization kinetics of glassy Se98In2
(2009) H. Kumar; N. Mehta; K. Singh; N.S. Saxena
Differential scanning calorimetry (DSC) has been used to study the crystallization kinetics of glassy Se98In2 both before and after irradiation of the alloy with high-energy (50 MeV) lithium ions. After the ion-irradiation, significant changes in the kinetic parameters of crystallization of the glass were observed. The results are explained in terms of a model involving irradiation-induced defects.
Correlation between Meyer-Neldel rule and phase separation in Se98-xZn2Inx chalcogenide glasses
(2009) Abhay Kumar Singh; Neeraj Mehta; Kedar Singh
The present work reports the observation of Meyer-Neldel rule for the thermally activated crystallization of glassy Se98-xZn2Inx (0 ≤ x ≤ 10) alloys. We have observed a strong co-relation between the pre-exponential factor K0 of rate constant K(T) of crystallization and activation energy of crystallization Ec in the present case. This indicates the presence of compensation effect for the non-isothermal crystallization process in the present glassy system, which is explained in terms of phase separation of the present alloys due to flaw bonds of these amorphous solids. © 2008 Elsevier B.V. All rights reserved.

2009