【作者】 韩琳； 王力军； 来永春； 黄永章；

【Author】 HAN Lin, WANG Li-jun, LAI Yong-chun, HUANG Yong-zhang (General Research Institute for Nonferrous Metals, Beijing 100088, China; Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875, China)

【机构】 北京有色金属研究总院； 北京师范大学低能核物理研究所；

【摘要】 采用交流微弧氧化方法,在LT24铝合金管表面氧化生成厚度约为20μm的致密陶瓷氧化膜,并利用扫描电镜、X射线衍射等方法研究氧化陶瓷膜的形貌及相组成。结果表明:该氧化时瓷膜分为两层,表面疏松层和内部致密层,厚度均为10μm左右;致密层和基体界面十分清晰,没有明显的过渡区,具有良好的冶金结合;陶瓷氧化膜表面较为平整,由直径为10-15μm的颗粒组成,膜层很致密,表面孔隙率为0.9%;陶瓷氧化膜主要由γ-Al2O3相组成,α-Al2O3含量极低。更多还原

【Abstract】 Ceramic oxide coatings of 20 μm in thickness were made on the surface of LT24 aluminum alloy by alternating current microarc oxidation. The morphology and phase composition were studied by scanning electron microscopy and X-ray diffractometry. The result show that the oxide film includes loose layer and compact layer with the thickness of 10 μm. There is a clear interface and has no transition-layer. The ceramic films surface is composed of zirconia grain with the diameter of 10 - 15 μm . The aperture rate of the film layer is less than 1 % , and the film layer is very compact. Ceramic films is composed of α-Al2O3 phase mainly, but it also has seldom α-Al2O3 phase.更多还原