摘要
使用自制100kW微弧氧化设备,在弱酸性电解液(pH=6 5～7)介质中进行微弧氧化试验。在铝合金表面制备出了致密、光滑、高硬度的陶瓷层。研究了陶瓷层的生长规律以及氧化电压随时间的变化规律。研究表明,在弱酸性介质中,同样可以发生微等离子体放电现象;对弱酸性介质中的微弧氧化而言,初期的电压变化规律同碱性条件下基本一致;中期生长速度明显低于碱性介质下的速度;末期生长速度的降低较碱性介质中的快。
The compact and high-hardness ceramic coating was prepared on the surface of the aluminum alloy, by the micro-arc oxidation(MAO) treatment using the self-manufactured 100 kW equipment in the weak-acid(pH=6.5～7) electrolyte. The laws of the growing of the ceramic coating and the variety of voltage on the time are studied in the paper. The study shows that the phenomena of micro plasma discharge happen in the weak-acid electrolyte as well as that in the alkaline electrolyte. During the MAO testing in the weak-acid electrolyte, the law of the growing of the voltage on the time is similar to that in the alkaline electrolyte at the beginning, and the growing-speed of ceramic coating is higher than that in the alkaline electrolyte in metaphase, and the growing-speed reduces more sharply than that in the alkaline electrolyte at the ending.
出处
《轻合金加工技术》
CAS
北大核心
2005年第6期32-34,共3页
Light Alloy Fabrication Technology
关键词
微等离子体
微弧氧化
铝合金
陶瓷层
micro plasma
micro-arc oxidation
aluminum alloy
ceramic coating
