【作者】 吴汉华； 吕宪义； 龙北玉； 汪剑波； 王秀琴； 金曾孙； 李哲奎；

【Author】 WU Han-hua, LU Xian-yi, LONG Bei-yu, WANG Jian-bo,WANG Xiu-qin, JIN Zeng-sun, LI Zhe-kui State Key Laboratory for Superhard Materials, Jilin University, Changchun 130012, China; College of Physics, Jilin University, Changchun 130021, China; Department of Physics, Yanbian University, Yanbian 133000, China)

【机构】 吉林大学超硬材料国家重点实验室； 吉林大学物理学院； 延边大学物理系；

【摘要】 采用微弧氧化技术在铝合金上制备了陶瓷膜。借助于先进的结构和表征手段,系统地研究了阳极电流密度ja和阴/阳极电流密度比jc/ja对铝合金微弧氧化陶瓷膜显微硬度的影响,实验结果表明,对于不同的jc/ja,陶瓷膜的显微硬度都随ja的变化而出现一个峰值,且不同jc/ja的峰值大小(显微硬度)和对应的ja有所不同。当ja=15A/dm2,jc/ja=0.7时,所制备的陶瓷膜显微硬度最高为4300HV.SEM和抗点腐蚀研究表明,jc/ja对陶瓷膜的微观结构和耐腐蚀性能影响很大。更多还原

【Abstract】 The ceramic coatings on Al alloy were fabricated by using MAO technique. The effects of the anodic current density (ja) and the ratio of cathodic to anodic current density (jc/ja) on microhardness of the MAO coatings were systematically investigated by means of the advanced structure and characterization method. The experimental results show that there is a peak microhardness on the curve of coating hardness against ja at different jc/ja and the corresponding ja of the peak microhardness at different jc/ja is different. Microhardness of the coating prepared at ja=15A/dm2 and jc/ja=0.7 is 4300HV, which is the highest in all the MAO coatings. In addition, The investigation of SEM and the erosion resistance show thatjc/ja has a significant effect on the microstructure and anti-point corrosion of MAO coatings.更多还原