Article
On the isothermal kinetics analysis of transformations in metastable systems. A combined use of isothermal and non-isothermal calorimetry
Author/s | Blázquez Gámez, Javier Sebastián
Millán, Mitchel D. Conde Amiano, Clara Francisca Conde Amiano, Alejandro |
Editor | Conde Amiano, Alejandro |
Department | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Publication Date | 2007 |
Deposit Date | 2016-12-07 |
Published in |
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Abstract | A procedure to optimize the isothermal calorimetric data of very slow transformation
processes of metastable systems is proposed. The method uses an experimental baseline
to identify the transitory effects due to the ... A procedure to optimize the isothermal calorimetric data of very slow transformation processes of metastable systems is proposed. The method uses an experimental baseline to identify the transitory effects due to the equipment. Moreover, the combined use of isothermal and non-isothermal results is shown to be effective to overcome the intrinsic problems of low signal and signal drift for such processes. The procedure has been applied to the analysis of the nanocrystallization kinetics of the Fe60Co18Nb6B16 alloy at different devitrification stages. Based on microstructural observations, an instantaneous growth approach was assumed and a phenomenological expression of the dependence of the nucleation frequency with both the transformed fraction and the temperature was obtained |
Citation | Blázquez Gámez, J., Millán, M.D., Conde Amiano, C.F. y Conde Amiano, A. (2007). On the isothermal kinetics analysis of transformations in metastable systems. A combined use of isothermal and non-isothermal calorimetry. Philosophical Magazine, 87 (27), 4151 p.-4167 p.. |
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