Reminescences

Application of a Numerical Method for the Analysis of Metglas 2826 MB Crystallization Kinetics

Stanislav Kurajica ; Faculty of Chemical Engineering and Technology, University of Zagreb, 20 Marulićev trg, HR-10000 Zagreb, Croatia
Jörg Schmauch ; Universitat des Saarlandes, Fachbereich 7.3 Technische Physik, Im Stadtwald, Gebaude 43B, D-66123 Saarbrucken, Germany
Emilija Tkalčec ; Faculty of Chemical Engineering and Technology, University of Zagreb, 20 Marulićev trg, HR-10000 Zagreb, Croatia

Abstract

Crystallization kinetics of y-FeNiMo solid solution in Metglas 2826 MB was studied by isothermal differential scanning calorimetry (DSC). The Johnson-Mehl-Avrami (JMA) equation was used to describe the crystallization process. In order to calculate the kinetic parameters, a new model of the numerical analysis of isothermally obtained DSC data was successfully applied. For the purposes of method evaluation, the classical analytical method of data analysis was also performed. The apparent activation energies obtained were (280 ± 22) kJ mol-1 and (296 ± 23) kJ mol-1 for the analytical and numerical methods, respectively. The Avrami exponents obtained by both methods lie between 1.75 and 1.95.

Keywords

crystallization kinetics; differential scanning calorimetry; Johnson-Mehl-Avrami equation; Metglas 2826 MB; numerical model

Hrčak ID:

127550

URI

https://hrcak.srce.hr/127550

Publication date:

1.8.2002.

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