铝合金表面陶瓷化及绝缘性能研究  

Preparation and insulating property of ceramic coating on aluminum alloy surface

作　　者：何翔[1] 熊梦颖[1] 

机构地区：[1]中南民族大学等离子体研究所,湖北武汉430074

出　　处：《兵器材料科学与工程》2013年第1期39-42,共4页Ordnance Material Science and Engineering

摘　　要：采用直流脉冲微弧氧化工艺，在6063铝合金表面制备氧化陶瓷膜，讨论不同工艺条件下陶瓷膜的绝缘电阻和击穿电压。在择优选出Na2SiO3系电解液配方情况下，研究占空比、频率等放电参数及处理时间变化对陶瓷膜绝缘性能影响的规律。结果表明：膜层厚度随着氧化时间（5—45min）的增加而增厚，但临界点后有所下降；膜层电绝缘性能随占空比（5％～30％）的增大先扬后抑，也存在临界点；膜层电绝缘性能随频率（0．1—1kHz）的增加而变好。优化的电参数组合是提高陶瓷膜性能的关键之一。The oxidation ceramic coatings were prepared on the surface of 6063 aluminum alloys using DC pulse micro-arc oxidation technology. The insulation resistance and breakdown voltage of the ceramic coatings under different process conditions were discussed. Na2SiO3-based electrolyte formula was optimized, and the influence of duty cycle, frequency, and processing time on the insulating properties of the ceramic coatings was studied. The results indicate that the coating thickness increases with increasing processing time （5 to 45 min）, but decreases after the processing time beyond the critical value. The electrical insulating property of the oxidation coatings first increases and then decreases with increasing duty cycle （5% to 30% ）, and a critical value also exists. The electrical insulating properties of the oxidation coatings increase with increasing frequency （0.1 to 1 kHz）. The optimization of electrical parameters is ene of key ways to improve the performance of ceramic coatings.

关 键 词：微弧氧化 铝合金 表面处理 氧化陶瓷膜 绝缘性 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TG113.224[金属学及工艺—金属学]