中文摘要：

在Na2Si O3＋Na OH＋Na2EDTA体系下,采用恒压模式对氢化锆进行微弧氧化处理获得Zr O2陶瓷层。通过扫描电镜（SEM）、X射线衍射（XRD）仪、电子能谱（EDS）仪,分析了陶瓷层的表面形貌、截面形貌、相结构及陶瓷层的元素分布。结果表明：在硅酸盐体系中,通过恒压模式在Zr H1.8表面制得膜厚约为45m的Zr O2陶瓷膜,膜层分为过渡层、致密层和疏松层。EDS结果表明：微弧氧化陶瓷层中除基体元素Zr及溶液元素O外,未发现Si、Na等溶液元素的出现,说明Si O2-3、Na＋等没有参与反应;在硅酸盐体系中Zr H1.8表面微弧氧化陶瓷层主要由M-Zr O2、T-Zr O2及C-Zr O2构成,M-Zr O2约90%。

英文摘要：

Micro-arc oxidation（MAO） process was conducted on Zr H1.8 in an electrolyte composed of Na2 Si O3＋Na OH＋Na2EDTA under the constant voltage mode. The surface and cross-sectional morphologies, structure of the coatings and chemical composition were characterized by scanning election microscopy（SEM）, energy disperse spectroscopy（EDS）, and X-ray diffraction（XRD）. The results show that the coating obtained in the electrolyte composed of Na2 Si O3 under the constant voltage mode with an average thickness of 45 m is composed of transition layer, dense layer and loose layer. The EDS result shows that the micro-arc oxidation coating contains Zr and O only, but no Si and Na have been found, indicating that Si O2- 3and Na＋ are not involved in the reaction. Besides, the coating obtained in the Na2 Si O3 electrolyte under the constant voltage mode is mainly composed of M-Zr O2, T-Zr O2 and C-Zr O2, and the M-Zr O2 accounts for about 90%.