【作者】 吴汉华； 王秀琴； 龙北红； 汪剑波； 金曾孙； 李哲奎；

【Author】 WU Han-hua, WANG Xiu-qin, LONG Bei-hong, WANG Jian-bo, JIN Zeng-sun , LI Zhe-kui( State Key Laboratory for Superhard Materials, Jilin University, Changchun 130012, China; College of Physics & Materials Science, Jilin University, Changchun 130021, China; Department of Physics, Yanbian University, Yanbian 133000, China)

【机构】 吉林大学超硬材料国家重点实验室； 吉林大学物理/材料学院； 延边大学物理系吉林；

【摘要】 在Na2CO3-Na2SiO3溶液中,采用正负不对称交流微弧氧化电源在钛合金上制备出了多孔金红石TiO2薄膜。利用X射线衍射仪(XRD)和扫描电镜(SEM)分别研究了钛合金微弧氧化陶瓷膜的相组成和微观结构,实验结果表明,氧化膜主要由大量金红石和少量锐钛矿TiO2组成;膜表面布满了尺寸不到4μm的小孔,膜截面没有明显的疏松层和致密层之分。对微弧氧化样品在3.5%NaCl溶液中的抗点腐蚀测试表明,阴极峰值电压与样品的耐腐蚀性能密切相关,当阴、阳极峰值电压和处理时间分别为45、320V和30min所制备的钛合金微弧氧化样品其抗点腐蚀能力最强。更多还原

【Abstract】 MAO films with porous rutile titania were prepared on titanium alloy substrate in a Na2CO3 and Na2SiO3 electrolytic solution by using an alternating current power supply with asymmetric pulse. XRD and SEM were employed to characterize the phase component and microstructure of the films. The experimental results show that the films consist of dominant rutile and a little anatase phases, and there are large amount of pores with size less than 4μm on coated surface. The porous layer and dense layer of the film are unobvious. Anti-point corrosive test in 3.5% sodium chloride solution shows that the cathodic voltage has an intense effect on anti-point corrosive ability of MAO films fabricated on titanium alloy substrate, and erosion resistance of the coating, which is prepared by keeping the anodic and cathodic voltage at 320V and 45V for 30 min, respectively, is the strongest in all the coated samples.更多还原