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Ｔｉ２Ｏ、ＣａＴｉＯ３、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Ｔｉ２Ｏ有关．
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.
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