Journal of Northeastern University ›› 2007, Vol. 28 ›› Issue (6): 821-824.DOI: -

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Fabrication of hydroxyapatite/Ti network composites

Xiu, Zhi-Meng (1); Cui, Jian-Dong (1); Bai, Hua (1); Sun, Xu-Dong (1)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2007-06-15 Published:2013-06-24
  • Contact: Xiu, Z.-M.
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Abstract: Hydroxyapatite (HA) powder was synthesized by sol-gel method with Ca(OH)2 and H3PO4 as reactants. The HA was coated with T1H2 powder using mechanical mixing method. Then the pure HA ceramics and HA/Ti composite were fabricated by hot-pressing. XRD results indicated that the predominant phase of the powder synthesized by sol-gel method and heat-treated at 900°C for 2 h is HA with a bit of CaO. The predominant phases of the HA/20vol%Ti composite that was hot-pressed at 1050°C were HA and Ti, with Ca2P2O7 and Ca3(PO4)2 shown at the same time. The fracture toughness and bending strength are 2.4 MPa·m-1/2 and 54 MPa for HA-25vol%Ti composite hot-pressed at 1050°C, respectively, higher than pure HA ceramic. The microstructure showed that there is a netty distribution of the metal Ti in the composite, which is beneficial to the resistance to crack propagation because the mechanism of crack bridging.

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