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Thermally activated crystallization of two FeNiPSi alloys

The crytsallization kinetics of two alloys in the Fe-Ni-P-Si quaternary system have been investigated, with both isothermal and continuous heating experiments, by means of differential scanning calorimetry. Both alloys present two separated crystallization processes. The Johnson-Mehl-Avrami-Erofeev equation with a rate constant following the Arrhenius behavior gives the best fit of the experimental data. In all processes the value of its JMAE kinetic exponent is not constant. In the nearly stages, n changes steeply revealing the transient nucleation effect to reach values corresponding to a three-dimensional volume growth controlled by diffusion in the central part (0.3

The work has been financed by MICYT grant MAT2000-0388 and Generalitat de Catalunya grant 1999SGR-0036

© Journal of Thermal Analysis and Calorimetry, 2002, vol. 70, núm. 1, p. 173-179

Elsevier

Author: Suñol Martínez, Joan Josep
Clavaguera-Mora, M-T.
Clavaguera, N.
Date: 2002 November 13
Abstract: The crytsallization kinetics of two alloys in the Fe-Ni-P-Si quaternary system have been investigated, with both isothermal and continuous heating experiments, by means of differential scanning calorimetry. Both alloys present two separated crystallization processes. The Johnson-Mehl-Avrami-Erofeev equation with a rate constant following the Arrhenius behavior gives the best fit of the experimental data. In all processes the value of its JMAE kinetic exponent is not constant. In the nearly stages, n changes steeply revealing the transient nucleation effect to reach values corresponding to a three-dimensional volume growth controlled by diffusion in the central part (0.3 The work has been financed by MICYT grant MAT2000-0388 and Generalitat de Catalunya grant 1999SGR-0036
Format: application/pdf
ISSN: 1388-6150 (versió paper)
1588-2926 (versió electrònica)
Document access: http://hdl.handle.net/10256/12745
Language: eng
Publisher: Elsevier
Collection: CICYT/PN 2000-2003/MAT2000-0388-C02-02
Reproducció digital del document publicat a: http://dx.doi.org/ 10.1023/A:1020665919650
Articles publicats (D-F)
Is part of: © Journal of Thermal Analysis and Calorimetry, 2002, vol. 70, núm. 1, p. 173-179
Rights: Tots els drets reservats
Subject: Cristal·lització
Crystallization
Aliatges
Alloys
Aliatges -- Propietats tèrmiques
Alloys -- Thermal properties
Title: Thermally activated crystallization of two FeNiPSi alloys
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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