无机材料学报

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50Ti/HA生物材料的组织结构与体外生物活性

宁聪琴; 周玉; 孟庆昌   

  1. 哈尔滨工业大学材料科学与工程学院, 哈尔滨 150001
  • 收稿日期:2000-03-27 修回日期:2000-04-27 出版日期:2001-03-20 网络出版日期:2001-03-20

Microstructure and in vitro Bioactivity of 50Ti/HA Biocomposite

NING Cong-Qin; ZHOU Yu; MENG Qing-Chang   

  1. School of Materials Science and Engineering; Harbin Institute of Technology Harbin 150001 China
  • Received:2000-03-27 Revised:2000-04-27 Published:2001-03-20 Online:2001-03-20

摘要: 通过热压烧结的方法制备出50Ti/HA生物复合材料,对其组织结构及其在模拟体液中的生物活性进行了研究.XRD结果表明,在1200℃烧结时,原始材料中的Ti与HA之间发生了复杂的化学反应,反应产物为TiO、CaTiO、CaO以及一种类TiP相.将复合材料浸入模拟体液一天后,其表面就形成一层连续的磷灰石膜,随着浸泡时间的延长,磷灰石膜逐渐增厚.这种膜沿[001]方向具有明显的择优取向,其形成主要与复合材料中生成的TiO有关.

关键词: 热压烧结, 50Ti/HA生物复合材料, 组织结构, 体外生物活性

Abstract: The 50Ti/HA biocomposite was fabricated by hot-pressing technique. The microstructure and in vitro bioactivity of the biocomposite were investigated.
The XRD results show that some reactions between titanium and hydroxyapatite occur in the biocomposite during sintering at 1200℃. The main reaction
products are Ti2O, CaTiO3, CaO and a TiP-like phase. A continuous hydroxyapatite film can be formed on the surface of the biocomposite when it is immersed in the
SBF for one day, and the thickness of the apatite film increases with the increase in immersion time. The apatite film has a preference along the orientation of [001]
and its formation is mainly due to the present of Ti2O phase in the composite.

Key words: hot-pressing, 50Ti/HA biocomposite, microstructure, in vitro bioactivity

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