采用电泳沉积在Ti6A14V钛合金表面制备了以生物玻璃（BG）为中间层，BG与氟取代磷灰石（FHA）复合粉末为表层的BG／BG—FHA涂层。通过XRD、SEM、EDS和电子万能力学试验机对BG／BG—FHA复合涂层的物相结构、微观形貌和涂层结合力进行了分析，优化了涂层的热处理制度，并通过模拟体液浸泡实验研究了涂层的体外生物活性。结果表明：涂层经过热处理后玻璃（BG）与钛合金基体发生化学反应，有新相Ti3（PO4）4生成，涂层和基体以化学冶金结合，结合力大于20MPa；优化后涂层的热处理制度为：热处理温度750℃，保温12min，随炉冷却。BG／BG—FHA涂层浸泡后表面形成缺钙的类骨磷灰石，成花瓣状生长，长度为几百纳米，具有优良的生物活性。
BG/BG- FHA composite coatings on the surface of Ti6Al4V alloy, which consist of a biological glass （BG） for the middle layer, BG and F doped hydroxyapatite （FHA） composite powder for the surface layer were prepared by electrophoretic deposition method. The phase composition, microstructure and adhesion of BG/BG- FHA composite coatings were analyzed by XRD, SEM, EDS and electronic universal material testing machine. The ameliorated heat-treatment process was obtained, and the in vitro biological activity was investigated by the soaking experiment in the simulated body fluid （SBF）. The results show that a new phase Ti3 （PO4）4 is generated in the interface between BG and Ti6A14V base alloy after the BG/BG - FHA composite coatings were heat- treated appropriately, and the binding mode of the interface is chemically metallurgical bonding, which is higher than 20 MPa. Optimized heat treatment processing parameters are as follows： heat treatment temperature 750℃, holding time 12 rain and furnace cooling. The bone- like calcium deficiency apatite, which grows like petal with several hundred nanometers in length, forms on the surface of BG/BG - FHA coating after soaking, showing excellent biological activity.
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