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用X射线衍射（XRD）法研究了LY12铝合金微弧氧化（MAO）陶瓷膜中的相分布，并提出了其形成机制结果表明：铝合金微弧氧化陶瓷膜主要由α-Al_2O_3,γ-Al_2O_3组成，从表层到里层，α相逐渐增加；表层主要由γ相组成，其含量基本上不随氧化时间变化陶瓷膜内外层α，γ相含量差异主要是由于微弧区熔融Al_2O_3凝固时冷却速率不同引起的
The phase distribution in MAO ceramic film of LY12 aluminum alloy was studied by X-ray diffraction (XRD) and its formation mechanism was proposed. The results show that the micro-arc oxidation ceramic film of aluminum alloy is mainly composed of α-Al 2 O 3, γ- Al_2O_3 composition, from the surface to the inner layer, the α phase increases gradually; the surface layer is mainly composed of γ phase, its content does not change with the oxidation time The difference of α, γ phase content in the ceramic film is mainly due to the micro-arc zone cooling Al 2 O 3 solidification cooling Rate caused by different