Effect of CNFs content on the tribological behaviour of spark plasma sintering ceramic-CNFs composites
Alumina-carbon nanofibres (CNFs) and silicon carbide-CNFs nanocomposites with different volume fraction of CNFs (0-100vol.%) were obtained by spark plasma sintering. The effect of CNFs content on the tribological behaviour in dry sliding conditions on the ceramic-carbon nanocomposites has been inves...
| Autores: | , , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2012 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/66380 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/66380 |
| Access Level: | acceso abierto |
| Palavra-chave: | Carbon nanofibres Ceramic-matrix composite Hardness Tribology Wear Alumina balls Ball-on-disk Ceramic composites Dry sliding Friction coefficients Tribological applications Tribological behaviour Wear mechanisms Wear rates Carbon nanofibers Ceramic materials Electric sparks Friction Nanocomposites Silicon carbide Sintered alumina Spark plasma sintering Wear of materials Carbon silicon carbide composites CIENCIA DE LOS MATERIALES E INGENIERIA METALURGICA |
| Resumo: | Alumina-carbon nanofibres (CNFs) and silicon carbide-CNFs nanocomposites with different volume fraction of CNFs (0-100vol.%) were obtained by spark plasma sintering. The effect of CNFs content on the tribological behaviour in dry sliding conditions on the ceramic-carbon nanocomposites has been investigated using the ball-on-disk technique against alumina balls. The wear rate of ceramic-CNFs nanocomposites decreases with CNFs increasing content. The friction coefficient of the Al 2O 3/CNFs and SiC/CNFs nanocomposites with high CNFs content was found to be significantly lower compared to monolithic Al 2O 3 and SiC due to the effect of CNFs and unexpectedly slightly lower than CNFs material. The main wear mechanism in the nanocomposite was abrasion of the ceramic and carbon components which act in the interface as a sort of lubricating media. The experimental results demonstrate that the addition of CNFs to the ceramic composites significantly reduces friction coefficient and wear rate, resulting in suitable materials for unlubricated tribological applications. © 2011. |
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