▎ 摘　　要

Graphene/hydroxyapatite (rGO/HAp) composite bioceramics were fabricated by plasma activated sintering using hydroxyapatite (HAp) as matrix and graphene (rGO) as reinforced phase. The effects of rGO addition on phase structure, bioactivity and fracture toughness of HAp ceramics matrix were systematically investigated. The results indicate that the incorporation of rGO is beneficial to promoting the bioactivity of HAp ceramics. Mean-while, hardness and fracture toughness of composite bioceramics initially increase and then decrease significantly with rGO concentration increasing. The hardness and fracture toughness of the specimen with rGO loading of 2wt% reach 6.97 GPa and 0.84 MPa.m(1/2), which display similar to 11.5% and similar to 37.3% improvements as compared to pure HAp ceramics, respectively. It is demonstrated that the pull-out effect of rGO is the major reason for enhancing the mechanical properties of composite ceramics.