Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (12): 1355-1359.doi: 10.15541/jim20180142

• RESEARCH PAPER • Previous Articles     Next Articles

Synthesis of Graphene/Hydroxyapatite Composite Bioceramics via Plasma Activated Sintering

Biao ZHANG(), Chang-An YANG(), Pei SHI   

  1. School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
  • Received:2018-04-02 Revised:2018-04-26 Online:2018-12-20 Published:2018-11-27
  • About author:ZHANG Biao. E-mail: yunzhuangzhb@163.com
  • Supported by:
    Shaanxi Science & Technology Co-ordination & Innovation Project (2017TSCXL-GY-07-05, 2015KTTSGY02-03);Doctoral Scientific Research Fund of Shaanxi University of Science & Technology (2017BJ-26);Graduate Innovation Fund of Shaanxi University of Science and Technology

Abstract:

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. Meanwhile, 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•m1/2, which display ~11.5% and ~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.

Key words: hydroxapatite, graphene, plasma activated sintering, bioactivity, fracture toughness

CLC Number: 

  • TB321