作　　者： ; ; ; ;

机构地区： 暨南大学理工学院材料科学与工程系

出　　处： 《特种铸造及有色合金》 2007年第2期97-100,共4页

摘　　要： 采用恒压模式微弧氧化对医用钛材表面改性,制备出含钙磷的TiO2复合膜层,借助于SEM、XRD和EDS研究了阳极电压对膜层的形貌、相组成和钙磷含量的影响,探讨了膜层表面和孔内钙磷的分布规律。研究结果表明,低压处理获得小孔径和锐钛矿型TiO2为主的膜层,钙磷含量和钙磷比较低,并且微孔内的钙磷含量少于膜层表面。随着阳极电压的提高,膜层的孔径增大,金红石型TiO2增多,钙磷含量和钙磷比增大。高压处理时微孔内的钙磷含量与膜层表面相当。提高微弧氧化恒压电压,可以促进Ti氧化反应。经过微弧氧化后的Ti表面多孔形貌、晶型和钙磷含量将对后续的水热处理羟基磷灰石的生成有重要影响。 TiO_2 composite film containing P and Ca was prepared on surface of medical Ti materials by microarc oxidation with constant voltage. The effects of anode voltage on the morphology, phase constituent and Ca, P content in the oxide films were investigated by SEM, XRD and EDS, focusing on the Ca and P content disposition regularity in the oxide film surface and in intra-pore. The results show that the composite film is composed of mini-pore and anatase TiO_2 phase with lower P and Ca contents as well as Ca/P ratio, in which the Ca and P contents in the mini-pore are lower than ones in film surface with low anode voltage treatment. The mini-pore, the volume number of the rutile TiO_2 and the Ca and P contents as well as Ca/P ratio are increased with the increase of anode voltage. Ca and P contents in mini-pore is equivalent to ones in the film surface in case of high anode voltage treatment. The Ti oxidization reaction can be effectively promoted with increasing constant voltage. After MAO (micro-arc oxidation), Ti surface porous morphology, phase constituent and Ca, P contents would have an important effect on the formation of hydroxyapatite in hydrothermal synthesis treatment.

关 键 词： 微弧氧化 复合膜层 阳极电压

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]