High graphene fillers content for improving the tribological performance of silicon nitride-based ceramics
The effect of large graphene nanoplatelets (GNPs) additions on the friction and wear of silicon nitride (Si3N4) ceramics is evaluated under isooctane lubrication. All Si3N4/GNPs composites, with up to 20.6 vol% of graphene fillers, exhibit better tribological response than Si3N4, in particular, a 50...
| Autores: | , , |
|---|---|
| Formato: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2019 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/240339 |
| Acesso em linha: | http://hdl.handle.net/10261/240339 |
| Access Level: | acceso abierto |
| Palavra-chave: | Ceramic-matrix composites Graphene Sliding friction Sliding wear Wear testing |
| Resumo: | The effect of large graphene nanoplatelets (GNPs) additions on the friction and wear of silicon nitride (Si3N4) ceramics is evaluated under isooctane lubrication. All Si3N4/GNPs composites, with up to 20.6 vol% of graphene fillers, exhibit better tribological response than Si3N4, in particular, a 50% reduction in the friction that continuously decreases with the GNPs content is attained, jointly with an improvement in the wear resistance of up to 63%. The survival of a self-lubricant carbon-rich tribolayer formed on the worn surfaces controls the tribological properties of the materials. Si3N4/GNPs composites are promising materials to enhance the performance of gasoline direct injection systems. |
|---|