Design,fabrication,microstructure and properties of Cu-(graphene/6063Al)composites
In this paper,the Cu-6063Al composites and 0.5％,1.0％content Cu-(graphene/6063Al)composites were fabricated by cold isostatic pressing+vacuum hot pressing sintering+hot extrusion method using 6063A1 al-loy powders,graphene nanosheets and pure Cu sheet with a thickness of 2 mm as raw materials.The phase analy-sis,microstructure,fracture characterization and mechanical properties of the three composites were investigated by XRD,SEM and tensile testing machine.The metallurgical composite of graphene/6063A1 and Cu can effective-ly inhibit the diffusion of Al atoms,and thus inhibit the formation of Al4Cu9,Al2Cu 和 AlCu intermetallic com-pounds at the Cu/Al interface in Cu-6063A1 composites.The tensile strength of 0.5％and 1.0％Cu-(graphene/6063A1)composites is 76.9 MPa and 101.3 MPa,which are 40％and 83.8％higher than that of Cu-6063A1 com-posites respectively,and the elongation is decreased.The Cu-(1.0％graphene/6063Al)composite possess excellent mechanical properties,due to a small amount of brittle phase at the Cu/Al interface and more,smaller,deeper dim-ples,wider tearing edges and tighter distribution of graphene nanosheets near the interface layer of Al side.
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