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.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2013年第1期39-42,共4页
Ordnance Material Science and Engineering
关键词
微弧氧化
铝合金
表面处理
氧化陶瓷膜
绝缘性
micro-arc oxidation
aluminum alloy
surface treatment
oxidation ceramic coating
insulating properties
