摘要
在磷酸盐溶液中,研究了Na2WO4含量和电流密度对陶瓷层形成过程及耐磨性的影响;通过SEM、XPS等手段分析了陶瓷层的表面形貌和W元素含量及其组成。结果表明:氧化起弧发生前,Na2WO4能促使阳极氧化膜的形成;氧化起弧发生后,Na2WO4参与反应,进入膜层。Na2WO4含量在7g/L时,膜层具有很好的致密性和耐磨性;随电流密度的增加,膜层增加,前期磨损量相对增加,后期趋于平稳。
The influences of Na2WO4 ＇s concentration and current density on the forming process of ceramic coatings and wear resistance are studied in phosphate solution. The microstructures, ‘W＇ content and components are analyzed by SEM and XPS. The result indicates： after MAO occurs, they may involve in the reaction, and then enter into ceramic coatings. The ceramic coatings prepared by micro-arc oxidation has excellent compactability and wear resistance when the concentration of Na2WO4 is 7 g/L. With increasing of current density, the thickness of ceramic coatings grows, previous wear extent increases and final wear extent keeps invariableness.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2006年第9期155-157,共3页
Materials Reports
基金
国家"863"基金资助(2002AA331120)
