Tribological performance under dry sliding conditions of graphene/silicon carbide composites. Issue 3 (February 2016)

• Record Type: Journal Article
• Authors: Llorente, Javier; Román-Manso, Benito; Miranzo, Pilar; Belmonte, Manuel
• Is Part Of: Journal of the European Ceramic Society. Volume 36:Issue 3(2016)
• Page Start: 429
• Page End: 435
• Publication Date: 2016-02
• Subjects: Graphene -- Wear -- Friction -- Ceramic matrix composites -- Silicon carbide; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2015.09.040
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: The role played by graphene in the friction and wear behaviour of graphene/silicon carbide (SiC) composites, tested under dry sliding conditions and using silicon nitride balls as counterbodies, is investigated as a function of the graphene nanoplatelets (GNPs) content and the graphene source. GNPs composites show an enhanced wear resistance as compared to monolithic SiC, with maximum improvements of ∼70% for the material containing up to 20 vol.% of GNPs; whereas the friction performance depends on the sliding distance and GNPs content. The analysis of the wear debris by micro-Raman spectroscopy evidenced that the tribological behaviour of the GNPs/SiC materials is linked to the formation of an adhered lubricating and protecting tribofilm. Multilayered graphene fillers participate more actively in the protecting tribofilm than other graphene sources such as reduced graphene oxide or in-situ grown graphene flakes.