Tribological behavior of graphene reinforced ceramics
摘要
Graphene-incorporated ceramics are recognized as promising candidates for various tribological applications, including machining tools, nozzles, mechanical seals, bearings, and gears. Generally, graphene-incorporated ceramics exhibit lower friction coefficients and wear rates compared to ceramic composites reinforced by other lubricants, including CaF5, MoS2, h-BN, carbon fiber, and CNTs. This review comprehensively summarizes the current knowledge of the tribological performance of graphene-reinforced ceramics, highlighting the effects of in situ grown graphene, core-shell structured graphene, three-dimensional assembled graphene, and functionally graded graphene on the friction and wear properties of ceramics. In situ graphene forms stable lubrication films, effectively reducing the friction coefficient of the ceramic matrix. Core-shell structured graphene ceramics achieve outstanding wear resistance through rolling friction mechanisms and crack inhibition. Three-dimensional assembled graphene enhances the stability of lubrication films and contributes to superior friction reduction. Functionally graded graphene ceramics optimize internal structures, improving impact resistance and tribological stability. Furthermore, the challenges and future development directions of graphene-incorporated ceramics are discussed, highlighting their promising applications in high-temperature, extreme environments, and precision mechanical systems.