Effect of Graphene on the Microstructure and Mechanical Properties of WC-Based Cemented Carbide

WC-based cemented carbides were prepared by spark plasma sintering (SPS) of WC-Co-Cr3C2-VC alloy powder adding different contents graphene. The phase composition, microstructure, mechanical properties, and magnetic properties carbide investigated means XRD, SEM, Vickers hardness fracture toughness tests, tests. results showed that the specimens show a trend first increasing then decreasing with increase in graphene content. After 0.6 wt.% graphene, is uniformly distributed on substrate form flakes, WC grain size decreases, specimen increases to 2009 HV, relative density 94.3%, 11.72 MPa·m1/2, coercivity sample 437.55 Oe. Therefore, content has excellent comprehensive performance (Vickers toughness).