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采用微弧氧化处理技术和电解液成分的优化设计,在纯钛表面制备了含钙磷的多孔复合陶瓷膜,并考察了陶瓷膜的表面形貌、截面形貌、化学成分、物相构成、生物活性及其与基体的结合强度等特性。研究结果表明:纯钛表面微弧氧化后形成了凹凸不平的多孔陶瓷膜,整个膜层分为表层疏松层、中间过渡层和内部致密层三个区域,总厚度为25～40μm,膜层与基体的界面呈“锯齿状”紧密结合。膜层主要由金红石相TiO2和锐钛矿相TiO2构成;膜层中含有Ca,P,O,Ti四种元素,其钙磷比ω(Ca)∶ω(P)为1.528;膜层中的Ti,Ca,P元素呈梯度分布,由表及里Ti含量逐渐增多,Ca和P含量逐渐减少,O元素分布比较均匀。含钙磷多孔复合陶瓷膜具有良好的生物活性,样品经碱液处理后再在快速钙化溶液(FCS)中浸泡4d即有羟基磷灰石(HA)形成;膜层与基体具有高的结合强度,在450V和600Hz时膜层的临界载荷值高达29.5N。
The micro-arc oxidation treatment technology and the optimal design of the electrolyte composition were used to prepare the porous composite ceramic membrane containing calcium and phosphorus on the surface of pure titanium. The surface morphology, cross-sectional morphology, chemical composition, phase composition, Biological activity and its combination with the matrix strength and other characteristics. The results show that the micro-oxidation of pure titanium surface to form a porous ceramic membrane uneven, the entire film is divided into three areas of the surface of the loose layer, the intermediate transition layer and the inner dense layer, with a total thickness of 25 ~ 40μm, The interface of the substrate is “serrated” tightly. The film mainly consists of rutile TiO2 and anatase TiO2. The film contains four elements of Ca, P, O and Ti with the ratio of calcium to phosphorus (ω): ω (P) 1.528; The contents of Ti, Ca and P show a gradient distribution. The contents of Ti and Ti gradually increase and the contents of Ca and P decrease gradually, while the distribution of O is more uniform. Calcium-phosphorus porous composite ceramic membrane has good biological activity, the sample after lye treatment and then in the rapid calcification solution (FCS) immersed 4d hydroxyapatite (HA) that is formed; film and the substrate has a high bond strength , 450V and 600Hz when the film critical load value up to 29.5N.