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Título: | Two-step strategy for improving the tribological performance of Si3N4 ceramics: Controlled addition of SiC nanoparticles and graphene-based nanostructures |
Autor: | Llorente, Javier; Ramírez, Cristina CSIC ORCID; Belmonte, Manuel CSIC ORCID | Palabras clave: | Tribology Friction Wear Ceramic composites Graphene |
Fecha de publicación: | 20-jun-2020 | Editor: | Elsevier | Citación: | Journal of the European Ceramic Society 40: 5298- 5304 (2020) | Resumen: | The tribological behaviour of silicon nitride (Si3N4) ceramics is investigated using a two-step strategy. A set of ceramic composites containing silicon carbide nanoparticles (SiCn) is developed and, subsequently, graphene-based fillers are added to the Si3N4/SiC composite with the best tribological performance. The friction coefficient and the wear rate of Si3N4 are reduced up to 22 % and 40 %, respectively, when a 10 vol.% of SiCn is incorporated into the ceramic matrix due to its improved mechanical response. Si3N4/SiC composites containing 11 vol.% of graphene nanoplatelets (GNPs) or reduced graphene oxide sheets (rGOs) are analysed under isooctane lubrication and dry testing. rGOs composite leads to an important decrease of the friction coefficient (50 %) under lubricated conditions, and an enhancement of the wear resistance (44 %) under dry sliding tests, as compared to the reference Si3N4/SiC. The best performance of rGOs composite is due to the nature of the lubricating tribofilm and its excellent toughness. | Versión del editor: | http://dx.doi.org/10.1016/j.jeurceramsoc.2020.06.053 | URI: | http://hdl.handle.net/10261/240354 | DOI: | 10.1016/j.jeurceramsoc.2020.06.053 | ISSN: | 0955-2219 | E-ISSN: | 1873-619X |
Aparece en las colecciones: | (ICV) Artículos |
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Llorente_Two_JECS-D-20-01259_R1_postprint.pdf | 1,66 MB | Adobe PDF | Visualizar/Abrir |
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