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Modèle de cinétique de cristallisation en régime dynamique dans les solides amorphes

Abstract : The normal interpretation of kinetic parameters in thermal analysis (DTA, TG) are deduced from isothermal experiments. In the present work, we propose a method which takes into account non-isothermal conditions, particularly high heating rates are considered. The new basic equation for the reaction rate includes in the Arrhenius relation the number of nuclei per unit volume in the sample at temperature T. This number is a function of the heating rate v. This model allows, in particular, to account for the curvature of the variation of ln (v/Tc2) as a function of the inverse of the crystallization peak temperature (1/ Tc) for high heating rates in DTA experiments. This model is applied successfully to DTA results on an amorphous CdGeAs2 compound.
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https://hal-emse.ccsd.cnrs.fr/emse-00610547
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Submitted on : Friday, July 22, 2011 - 2:02:16 PM
Last modification on : Wednesday, August 26, 2020 - 10:38:04 AM

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Huu Danh Tran, A. Defresne, Michel Soustelle. Modèle de cinétique de cristallisation en régime dynamique dans les solides amorphes. Journal of Thermal Analysis and Calorimetry, Springer Verlag, 1980, 18 (1), pp.169-183. ⟨10.1007/BF01909465⟩. ⟨emse-00610547⟩

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