β钛合金微弧氧化膜制备及其在人体模拟液中腐蚀性能研究  

Preparation of micro-arc oxidation film on β titanium alloy and its corrosion behavior in a simulated body fluid

作　　者：金磊[1] 崔文芳[1] 宋秀[1] 周廉[1,2] 

机构地区：[1]东北大学材料织构与各向异性教育部重点实验室,沈阳110819 [2]西北有色金属研究院,西安710016

出　　处：《材料与冶金学报》2014年第1期40-45,共6页Journal of Materials and Metallurgy

基　　金：中央高校基本科研业务费资助(N100702001;N120310001);国家博士后科学基金面上项目(2012M510820);辽宁省博士启动基金项目(20131036);国家自然科学基金青年科学基金项目(51301037)

摘　　要：采用微弧氧化技术在TiNbZrFe合金表面制备出含钙磷成分的多孔氧化膜,通过人体模拟液浸泡的方法诱导生成羟基磷灰石,并利用电化学阻抗谱(EIS)研究其在人体模拟液中浸泡不同时间后的耐腐蚀性能.结果表明,经400 V电压微弧氧化后TiNbZrFe合金表面氧化膜的形貌与成分达到最优化,且明显有α-Ca3(PO4)2相生成;α-Ca3(PO4)2相能够起到良好的诱导生成羟基磷灰石(HA)的作用,在人体模拟液中浸泡1 d后,通过XRD检测出有HA相生成,导致微弧氧化膜层表面的微孔被诱导生成物覆盖填充明显,较小微孔完全消失;随着浸泡时间的延长,经过微弧氧化膜诱导生成的HA涂层不断增厚,EIS结果表明其具有良好的隔绝渗透作用,能够阻碍腐蚀性介质在溶液和金属界面之间扩散和迁移,从而起到保护基体抗腐蚀的作用.Ca - P containing porous oxidation film was prepared on the surface of biomedical β - type TiNbZrFe alloy by micro- arc oxidation （MAO）, and the hydroxyapatite stoichiometric （HA） was successfully induced through immerging the film in a simulated body fluid. The electrochemical impedance spectroscopy （EIS） was carried out to study the corrosion properties of the coated alloy immerged in SBF for different times. The results showed that the composition and the morphology of the oxide film on TiNbZrFe alloy was optimized at a MAO voltage of 400V. An α - Ca3 （ PO4 ） 2 phase formed in the film and this phase played an effective role to induce HA, which can be detected by XRD through immerging it for 1 day. A porous HA film covered on the alloy surface, and even the smaller pores entirely disappeared. The thickness of HA coatings increased with the immersing time, EIS results showed that the HA coatings have effective isolating effect, which can hinder diffusion and transmission migration of the corrosive medium through the interface between the corrosive solution and the metal, so that the substrate can be protected from corrosion.

关 键 词：微弧氧化 人体模拟液 腐蚀性能 α-Ca3(PO4)2 羟基磷灰石(HA) 交流阻抗 

分 类 号：TG146.2[一般工业技术—材料科学与工程]