Artículo
Mechanical characterization of sol-gel alumina-based ceramics with intragranular reinforcement of multiwalled carbon nanotubes
Autor/es | Rivero Antúnez, Pedro
Cano Crespo, Rafael Esquivias Fedriani, Luis María Rosa Fox, Nicolás de la Zamora Ledesma, Camilo Domínguez Rodríguez, Arturo Morales Flórez, Víctor |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2020 |
Fecha de depósito | 2020-09-17 |
Publicado en |
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Resumen | Multiwalled carbon nanotubes (MWCNTs) have been widely considered for mechanical reinforcement of ceramic matrix composites. Nevertheless, the efficiency of this reinforcement strategy is under debate due to fabrication ... Multiwalled carbon nanotubes (MWCNTs) have been widely considered for mechanical reinforcement of ceramic matrix composites. Nevertheless, the efficiency of this reinforcement strategy is under debate due to fabrication issues, such as a good homogenization or the location of the MWCNTs inside the matrix composite. Regarding this, the intragranular location of the MWCNTs has been deemed a crucial feature for optimizing the reinforcement compared to the typical intergranular placement achieved by conventional procedures. Recently, the sol-gel method has been reconsidered, as it promotes the intragranular placement of the MWCNTs. This work presents the mechanical characterization of these composites synthesized by the sol-gel method, where crack-bridging has been revealed as toughening mechanism. Finally, the conventional use of the bibliographical Young's modulus of pure alumina for the estimation of the fracture toughness is discussed, obtaining significant improvements of the fracture toughness when indentation measurements are treated by considering elastic moduli obtained by nanoindentation. |
Identificador del proyecto | PGC2018-094952-B-100
P12-FQM-1079 |
Cita | Rivero Antúnez, P., Cano Crespo, R., Esquivias Fedriani, L.M., Rosa Fox, N.d.l., Zamora Ledesma, C., Domínguez Rodríguez, A. y Morales Flórez, V. (2020). Mechanical characterization of sol-gel alumina-based ceramics with intragranular reinforcement of multiwalled carbon nanotubes. Ceramics Internacional, 46 (12), 19723-19730. |
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