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采用微弧氧化-碱热处理在纯Ti表面制备了含有羟基磷灰石(HA)的仿生陶瓷膜。利用SEM,XRD和电化学工作站等手段研究了膜层的形貌、物相及其耐蚀性。结果表明:在乙酸钙-磷酸二氢钙电解液体系中微弧氧化(MAO),纯Ti表面形成一层含Ca和P的TiO2多孔陶瓷膜。经水热处理后,膜层表面的孔洞变小、致密性增加,膜层中还出现了鳞状、层片状以及针棒状的HA。在Hank’s模拟体液中,MAO膜和微弧氧化-碱热处理(MAOAH)膜均表现出较好的耐蚀性。MAO膜经模拟体液腐蚀后,形成了缺钙型HA(Ca8.86(PO4)6(H2O2)2)和CaTiO3;而模拟体液中的阴离子与MAOAH膜层的氧化物作用使膜层孔洞直径和深度增加。
The bionic ceramic membrane containing hydroxyapatite (HA) was prepared on pure Ti by micro-arc oxidation-alkali heat treatment. The morphology, phase and corrosion resistance of the films were studied by means of SEM, XRD and electrochemical workstation. The results show that a layer of TiO2 porous ceramic membrane containing Ca and P is formed on the pure Ti surface by micro-arc oxidation (MAO) in the calcium acetate-dihydrogen phosphate electrolyte system. After hydrothermal treatment, the surface of the membrane pores become smaller, more dense, also appeared in the film squamous, lamellar and needle bar-shaped HA. In Hank’s simulated body fluid, MAO membrane and MAOAH membrane showed good corrosion resistance. The MAO film formed a calcium-deficient HA (Ca8.86 (PO4) 6 (H2O2) 2) and CaTiO3 after simulated body fluid corrosion. However, the anions in the simulated body fluid interacted with the MAOAH film to make the hole diameter Increase in depth.