Preparation of the graphene nanosheets reinforced AgCuTi based composite for brazing graphite and Cu

Graphene nanosheets (GNSs) had been considered as the potential reinforcements of the composites. In this study, sponge-like graphene was used as a reinforcement to enhance the dispersity of GNSs in the metal matrix. AgCuTi alloy was melted and infiltrated into the sponge-like graphene, which led to the reaction between the GNSs and the AgCuTi alloy. The microstructure on the interface of the GNSs and AgCuTi alloy was characterized. The GNSs reinforced AgCuTi based composite was utilized as an interlayer to braze graphite and Cu, and the dispersity of the GNSs in the brazing seam was discussed. Comparing with the pure AgCuTi interlayer, the shear strength of the graphite and Cu joint was increased by 75% when the GNSs reinforced AgCuTi based composite interlayer was used.