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Título: | Enhanced properties of alumina-aluminium titanate composites obtained by spark plasma reaction-sintering of slip cast green bodies |
Autor: | Borrell, Amparo; Salvador, M. D.; Rocha, Victoria G. CSIC ORCID ; Fernández, Adolfo CSIC ORCID; Molina, Tamara CSIC; Moreno, Rodrigo CSIC ORCID | Fecha de publicación: | 2013 | Editor: | Elsevier | Citación: | Composites Part B: Engineering 47: 255-259 (2013) | Resumen: | Full dense alumina + 40 vol.% aluminium titanate composites were obtained by colloidal filtration and fast reaction-sintering of alumina/titania green bodies by spark plasma sintering at low temperatures (1250-1400 °C). The composites obtained had near-to-theoretical density (>99%) with a bimodal grain size distribution. Phase development analysis demonstrated that aluminium titanate has already formed at 1300 °C. The mechanical properties such as Vickers hardness, flexural strength and fracture toughness of bulk composites are significantly higher than those reported elsewhere, e.g. the composite sintered at 1350 °C show values of about 24 GPa, 424 MPa and 5.4 MPa m 1/2, respectively. The improved mechanical properties of these composites are attributed to the enhanced densification and the finer and more uniform nanostructure achieved by non-conventional fast sintering of slip-cast dense green compacts. © 2012 Elsevier Ltd. All rights reserved. | URI: | http://hdl.handle.net/10261/82939 | DOI: | 10.1016/j.compositesb.2012.11.010 | Identificadores: | doi: 10.1016/j.compositesb.2012.11.010 issn: 1359-8368 |
Aparece en las colecciones: | (ICV) Artículos (CINN) Artículos |
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