氧化电压和时间对Ti75钛合金微弧氧化膜性能的影响

Effects of voltage and time on properties of micro-arc oxidation coating on Ti75 titanium alloy

通过微弧氧化在Ti75钛合金表面成功制得微弧氧化膜层。电解液组成为:Na3PO4·12H2O14.0g/L,Na2SiO3·9H2O2.0g/L,添加剂3.0g/L。借助体视显微镜、涡流测厚仪、显微硬度计、X射线衍射仪等设备,研究了氧化电压和时间对微弧氧化膜形貌、厚度、显微硬度及构相等性能的影响。结果表明,微弧氧化膜层主要由金红石型和锐钛矿型TiO2组成。氧化电压和时间对氧化膜的形貌、厚度及显微硬度的影响较大。随氧化电压升高,微弧氧化膜层中金红石相TiO2的含量增大。氧化时间对微弧氧化膜层构相的影响不大。

Micro-arc oxidation （MAO） coating was successfully prepared on Ti75 titanium alloy by micro-arc oxidation from a bath containing Na3PO4 12H2O 14.0 g/L, Na2SiO3 9H2O 2.0 g/L, and additive 3.0 g/L. The effects of oxidation voltage and time on properties of MAO coating, such as morphology, thickness, microhardness, and structure, were studied by stereomicroscopy, eddy current thickness meter, microhardness tester, and X-ray diffractometer. The results indicate that the MAO coating is mainly composed of futile and anatase TiO2. The effects of oxidation voltage and time on the morphology, thickness, and microhardness of MAO coating are significant. The content of rutile TiO2 in MAO coating is increased with increasing oxidation voltage, while oxidation time has little effect on the structure of MAO coating.