Artículo
Improvement of Vickers hardness measurement on SWNT/Al2O3 composites consolidated by spark plasma sintering
Autor/es | Morales Rodríguez, Ana
Gallardo López, Ángela María Fernández Serrano, Antonia Poyato Galán, Rosalía Muñoz Bernabé, Antonio Domínguez Rodríguez, Arturo |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2014 |
Fecha de depósito | 2017-05-23 |
Publicado en |
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Resumen | Dense alumina composites with different carbon nanotube content were prepared by colloidal processing and consolidated by Spark Plasma Sintering (SPS). Single-wall carbon nanotubes (SWNTs) were distributed at grain boundaries ... Dense alumina composites with different carbon nanotube content were prepared by colloidal processing and consolidated by Spark Plasma Sintering (SPS). Single-wall carbon nanotubes (SWNTs) were distributed at grain boundaries and also into agglomerates homogeneously dispersed. Carrying out Vickers hardness tests on the cross-section surfaces instead of top (or bottom) surfaces has shown a noticeable increase in the reliability of the hardness measurements. This improvement has been mainly attributed to the different morphology of carbon nanotube agglomerates, which however does not seem to affect the Vickers hardness value. Composites with lower SWNT content maintain the Vickers hardness of monolithic alumina, whereas it significantly decreases for the rest of compositions. The decreasing trend with increasing SWNT content has been explained by the presence of higher SWNT quantities at grain boundaries. Based on the results obtained, a method for optimizing Vickers hardness tests performance on SWNT/Al2O3 composites sintered by SPS is proposed. |
Agencias financiadoras | Ministerio de Ciencia e Innovación (MICIN). España Junta de Andalucía |
Identificador del proyecto | MAT2009-11078
MAT2012-34217 P12–FQM–1079 |
Cita | Morales Rodríguez, A., Gallardo López, A.M., Fernández Serrano, A., Poyato, R., Muñoz Bernabé, A. y Domínguez Rodríguez, A. (2014). Improvement of Vickers hardness measurement on SWNT/Al2O3 composites consolidated by spark plasma sintering. Journal of the European Ceramic Society, 34 (15), 3801-3809. |
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