Artículo
Influence of Al2O3 reinforcement on precipitation kinetic of Cu-Cr nanocomposite
Autor/es | Sheibani, S.
Ataie, A. Heshmati-Manesh, S. Caballero Martínez, Alfonso Criado Luque, José Manuel |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2011 |
Fecha de depósito | 2017-11-23 |
Publicado en |
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Resumen | In this paper, the kinetic of precipitation process in mechanically alloyed Cu-1 wt.% Cr and Cu-1 wt.% Cr/3 wt.% Al2O3 solid solution was compared using differential scanning calorimetry (DSC), X-ray diffraction (XRD) and ... In this paper, the kinetic of precipitation process in mechanically alloyed Cu-1 wt.% Cr and Cu-1 wt.% Cr/3 wt.% Al2O3 solid solution was compared using differential scanning calorimetry (DSC), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The ageing kinetics in Cu¿Cr and Cu¿Cr/Al2O3 can be described using Johnson¿Mehl¿Avrami (JMA) and Sestak¿Berggren (SB) models, respectively. These different behaviors have been discussed in details. It was found that in presence of Al2O3 reinforcement, the ageing activation energy is decreased and the overall ageing process is accelerated. This behavior is probably due to higher dislocation density previously obtained during ball milling and Al2O3¿Cu interface. TEM observations confirm that Al2O3¿Cu interface and structural defects act as a primary and secondary nucleation sites, respectively. |
Agencias financiadoras | Gobierno de España |
Identificador del proyecto | ENE 2007-67926-C02-01 |
Cita | Sheibani, S., Ataie, A., Heshmati-Manesh, S., Caballero Martínez, A. y Criado Luque, J.M. (2011). Influence of Al2O3 reinforcement on precipitation kinetic of Cu-Cr nanocomposite. Thermochimica Acta, 526 (1-2), 222-228. |
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