微弧氧化膜封孔技术研究进展

Research Progress of Pore Sealing Technology for Micro-arc Oxidation Films

首先对微弧氧化中微孔产生机理进行了阐释,归纳并总结了微弧氧化封孔技术的最新研究进展。在不同封孔机理的基础上,分析了各种封孔方法的优缺点,如水合封孔、有机物封孔、无机物封孔和一些新型封孔工艺。其中自封孔展现出了较大优势,其包括溶液自封孔和外加电场自封孔两种方式。溶液自封孔是通过改变电解液的组成及配方实现自封孔,而外加电场自封孔主要是利用外加电场驱使带电粒子加速向微孔中移动并生成沉淀,使封闭微孔。最后对封孔工艺的发展趋势进行了展望。

The work explained the formation mechanism of micro-pores in MAO processing and summarized the latest research progress of pore sealing technology.On the basis of different sealing mechanisms,the advantages and disadvantages of various sealing methods were analyzed,such as hydration sealing,organic sealing,inorganic sealing and some new sealing techniques.The self-sealing showed great advantages,including self-sealing based on solutions and self-sealing based on external electric field.The self-sealing technology based on solutions was achieved by optimizing the composition and formula of electrolyte,and the other self-sealing based on the external electric field drove the charged particles moving toward micro- pores to form precipitate and to seal the pores.In addition,the development trend of the sealing technology is prospected.