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采用Ｘ射线衍射法（ＸＲＤ）和扫描电镜（ＳＥＭ）研究了ＬＹ１２铝合金微弧氧化（ＭＡＯ）陶瓷膜的相组成及形貌特征。结果表明，铝合金微弧氧化陶瓷膜主要由α－Ａｌ２Ｏ３，α－Ａｌ２Ｏ３相组成，氧化膜具有表面层、致密层、界面层３层结构。微弧大小一般为微米数量级，微弧区Ａｌ２Ｏ３处于熔融状态。
The phase composition and morphology of MAO ceramic film of LY12 aluminum alloy were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the micro-arc oxidation ceramic coating mainly consists of α-Al2O3 and α-Al2O3 phases. The oxide coating has three layers of surface layer, dense layer and interfacial layer. Micro-arc size is generally on the order of microns, micro-arc zone Al2O3 in a molten state.