铝表面微弧氧化制备含ZrO_2复合陶瓷膜层的组织与性能

Microstructure and Properties of Composite Ceramic Film Containing ZrO_2 Prepared by Micro-Arc Oxidation on Aluminum Surface

以正向电压及Na_2SiO_3、NaOH和ZrO_2的含量为微弧氧化主要工艺参数,设计了4因素3水平的正交试验方案,在1060纯铝板材表面制备了含ZrO_2复合陶瓷膜层。通过扫描电镜(SEM)分析该膜层的表面形貌,X射线衍射仪(XRD)分析相组成,表面粗造度仪分析表面粗糙度,光学显微镜(OM)分析厚度,涂层附着力测试仪分析膜层与铝基体的结合力。结果表明:正向电压对膜层表面粗糙度、厚度的影响相对较大;Na_2SiO_3含量对膜层与基体结合力影响相对较大。ZrO_2粉有助于提高膜层的致密度,减少膜层孔洞的数量与尺寸,提高其耐蚀性。

A four-factor and three-level orthogonal test scheme was designed to prepare composite ceramic film containing ZrO2on the surface of 1060aluminum,using positive voltage,concentrations of Na2SiO3,NaOH and ZrO2 as the main parameters of micro-arc oxidation.The surface morphology of the film was analyzed by scanning electron microscopy(SEM);the phase composition of the film was analyzed by X-ray diffraction(XRD);the surface roughness and the thickness were tested by roughness meter and optical microscopy(OM)respectively;and bonding force between the film and the substrate was tested by coating adhesion tester.The results show that the positive voltage had relatively large effects on the roughness and thickness of the film;the Na2SiO3 concentration had a relatively large influence on the bonding force between the film and the substrate.ZrO2particles could help to increase the density of the film,reduce the number and size of pores in the film,and improve its corrosion resistance.