The tribological performance of silicon carbide (SiC)/graphene nanoplatelets (GNPs) composites is analysed under oscillating sliding tests lubricated with isooctane, looking to explore their potential as components for gasoline direct injection (GDI) engines. High graphene filler contents (20 vol.% of GNPs) are required to substantially reduce the friction coefficient of SiC ceramics, attaining decreases on friction up to 30% independently of the applied load. For all materials and testing conditions a mild wear regime is evidenced. SiC/20 vol.% GNPs composite also enhances the wear resistance up to 35% at low load, but the addition of GNPs produces a deleterious effect as the load augments. The tribological behaviour depends on the formation and destabilization of a solid lubricant carbon-based tribofilm and strongly correlates with the mechanical properties of the tested materials.

在用异辛烷润滑的振荡滑动试验下分析了碳化硅（SiC）/石墨烯纳米片（GNP）复合材料的摩擦学性能，以探索其作为汽油直喷（GDI）发动机组件的潜力。需要大量的石墨烯填料含量（占GNP的20％（体积））才能充分降低SiC陶瓷的摩擦系数，而与施加的载荷无关，摩擦系数最多可降低30％。对于所有材料和测试条件，均证明存在轻度磨损状态。SiC / 20 vol。％GNPs复合材料还可以在低负载下将耐磨性提高到35％，但是随着负载的增加，添加GNPs会产生有害的影响。