LY12铝合金表面氧化铝陶瓷层的生长过程  

Growth of alumina ceramic coatings on aluminum matrix material surface

作　　者：蒋百灵[1] 白力静[1] 蒋永锋[1] 

机构地区：[1]西安理工大学材料学院,西安710048

出　　处：《中国有色金属学报》2001年第z2期186-189,共4页The Chinese Journal of Nonferrous Metals

基　　金：陕西科学技术研究发展项目 (99K -G3 )

摘　　要：借助于SEM和XRD观察了铝合金表面氧化铝陶瓷层的生长特性 ,测定了铝合金表面陶瓷层的相组成。结果表明 :氧化铝陶瓷层生长明显分为 3个阶段 ,起始阶段陶瓷的生长呈典型的柱状特征 ,后期以重熔增厚的方式为主 ,铝合金陶瓷层与基体间以微冶金过渡形式结合 ,陶瓷层表层中非定型相的比例高达 70 % ,其余为α Al2 O3 和γ Al2 O3 ;微弧氧化处理液的组成及电参数的选择对陶瓷层的生长有一定的影响。The growth feature in high electric fields and phase composition of alumina ceramic coating on aluminum surface by SEM and XRD were investigated. The results show that at first typical column features and then increasing height with mainly reciprocal molting were found on ceramic coating growth, which was influenced to some extent by the composition of microarc oxidation solution and substrate, and the proportion of amorphousness on ceramic coatings surface reached above 70%, the rest was α Al 2O 3 and γ Al 2O 3.

关 键 词：脉冲电场 陶瓷层 生长特性 微冶金结合 

分 类 号：TB74.453[一般工业技术—材料科学与工程]