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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表面制备出了多孔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,它们在氧化膜中各自所占的比例受处理电压的影响较大,当处理电压在210~320 V之间时,锐钛矿TiO2的含量随处理电压的提高而快速下降;而金红石TiO2含量则随处理电压的提高快速增加;当处理电压在320~410 V之间时,锐钛矿TiO2的含量随处理电压的变化较小,而金红石TiO2的含量随处理电压的升高有所下降;氧化膜表面呈多孔结构,随着处理电压的增加,这些微孔的尺寸明显变大,其密度逐渐减少.
In Na2CO3-Na2SiO3 solution, a porous TiO2 film was prepared on the surface of titanium alloy by asymmetric AC micro-arc oxidation power supply.The micro-arc oxidation of titanium alloy was studied by X-ray diffraction (XRD) and scanning electron microscope (SEM) The phase composition and the microstructure of the ceramic film.The experimental results show that the oxide film is mainly composed of a large amount of rutile and a small amount of anatase TiO2, the proportion of each in the oxide film is greatly affected by the processing voltage, The content of anatase TiO2 decreased rapidly with the increase of the treatment voltage when the temperature was between 210 and 320 V. The rutile TiO2 content increased rapidly with the increase of the treatment voltage. When the treatment voltage was between 320 and 410 V, The content of TiO2 in the ore changed little with the treatment voltage, while the content of rutile TiO2 decreased with the increase of the treatment voltage. The surface of the oxide film showed a porous structure. With the increase of the treatment voltage, the size of these micropores became larger, Its density gradually decreases.