Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites

The incorporation of graphene-based nanodispersoids in ceramic coatings is known to enhance the wear behavior these materials. In this study, for first time, alumina/graphene nanoplatelets (GNPs) were deposited through Suspension High Velocity Oxy-Fuel (SHVOF) thermal spray on Al2O3/TiC substrate composites, which laser microtextured with grid and line surface patterns. Dense around 8?10 ?m thickness obtained by spraying alumina suspension containing 1 wt. % GNPs. tribological performance alumina/GNPs composites was evaluated using ball-on-disc sliding tests. coated textured pattern showed best reaching a steady coefficient friction (CoF) at lower distances presenting lowest rate counterbody.