在 Na₂SiO₃-NaOH 体系的电解液中,对 Mn 元素含量不同的 1070 纯铝及 3003 铝合金进行等离子体电解氧化。 对所得陶瓷层的厚度及显微硬度进行了测试,并分析了陶瓷层的微观形貌及相组成。 结果表明:1070 纯铝表面所形成的陶瓷层由 α-Al₂O₃ 及 γ-Al₂O₃ 组成,而 3003 铝合金表面所形成的陶瓷层则由 γ-Al₂O₃ 组成;处理时间相同时,3003 铝合金所形成的陶瓷层较纯铝 1070 所形成的陶瓷层更厚,但显微硬度更低,致密性下降,Mn 元素对反应过程中高温氧化铝相的形成有一定的抑制作用。

Applying plasma electrolytic oxidation in condition of Na₂SiO₃-NaOH solutions on pure aluminum 1070 and aluminum alloy 3003 . The thickness and microhardness of ceramic coatings were tested, and microstructure and phase composition of ceramic layer were analyzed. Results showed that, ceramic coatings of pure aluminum 1070 was consisted of phase α-Al₂O₃and phase γ-Al₂O₃, while aluminum alloy 3003 contained phase γ-Al₂O₃only; At the same processing time, the ceramic coatings of aluminum alloy 3003 were thicker but lower in micro-hardness and compactness than those of pure aluminum 1070 . Manganese element inhibited the formation of high temperature alumina phase on the reaction process.