Analysis of isothermal and non isothermal

Recrystallization kinetics of straight rolled silver

F. Salhi1,3, A. Berrada2, J. Aride3, J. Bernardini1, G. Moya1*

1 Laboratoire de Matériaux et Microélectronique de Provence UMR-CNRS n°6137

Université d’Aix Marseille III, 13397 Marseille Cedex 20, France

2 Laboratoire de Physique des Matériaux, Faculté des Sciences, Avenue Ibn Battouta, Rabat, Maroc

3 Laboratoire de Physico-Chimie des Matériaux, E.N.S Takaddoum,B.P 5118, Rabat, Maroc

* Corresponding author. E-mail: gerard.moya@univ.u-3mrs.fr

Received : 18 June 2004; revised version accepted : 29 October 2004

Abstract

Isothermal and non isothermal calorimetric experiments have been carried out to determine the kinetic parameters of straight rolled silver recrystallization at constant rate of rolling (t = 80%). Activation energies, estimated from the chemical reaction theory and the Johnson-Mehl-Avrami-Kolmogorov model, differ considerably by using isothermal and non isothermal measurements. Moreover standard Kissinger analysis gives also activation energies notably different from one another but in agreement with the results obtained by different methods from the chemical reaction and JMAK previous models (54.4 ± 2.7 kJ/mol and 36.8 ± 1.8 kJ/mol for isothermal and non isothermal recrystallisation respectively).

We can interpret the results by the presence of nucleation and growth phenomena occurring more or less simultaneously during the progress of the recrystallization.

Keywords: Silver; Recrystallization; Kinetics parameters; Isothermal / non isothermal calorimetry.

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