Short communicationGraphene-enhanced Cu composite interlayer for contact reaction brazing aluminum alloy 6061

•Few-layer graphene-enhanced Cu composite interlayer was prepared by CVD for brazing.•Our obtained graphene could effectively impede the intensive Al-Cu eutectic reaction.•The graphene contributed to strengthening the joint.

Contact Reaction Brazing of aluminum alloy 6061 using pure Cu nanoparticle interlayer usually encounters cracks and holes due to the intensive Al-Cu eutectic reaction. In order to solve these problems, here we report a new type of graphene-enhanced Cu composite (G-Cu) interlayer prepared by CVD to contact reaction braze aluminum alloy 6061. Results show that the G-Cu interlayer is conducive to retarding the intensive Al-Cu eutectic reaction. The average shear strength of the joint brazed with G-Cu interlayer reached 74 MPa.