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采用以铝酸盐为主的碱性水溶液,对7075超高强度铝合金进行不同时间的微弧氧化表面处理,通过SEM和XRD对氧化陶瓷层的组织结构进行分析,研究不同微弧氧化时间对显微硬度、磨损性能和电化学性能的影响。结果表明:制备的陶瓷层致密,厚度大于50μm,与基体材料形成冶金结合;陶瓷膜层由γ-Al2O3和α-Al2O3两相组成,其中γ-Al2O3相含量较多,并且随着微弧氧化时间的延长,表面粗糙度增加,α-Al2O3相数量增加,陶瓷层具有高的显微硬度(1 423HV0.1),且抗蚀性和抗耐磨性能增强。
The aluminate-based alkaline aqueous solution was used to treat the 7075 ultra-high strength aluminum alloy by micro-arc oxidation at different times. The microstructure of the oxide ceramic layer was analyzed by SEM and XRD. The effects of different micro-arc oxidation time Effect of microhardness, wear and electrochemical properties. The results show that the prepared ceramic layer is dense and has a thickness of more than 50 μm and forms a metallurgical bond with the matrix material. The ceramic layer consists of two phases of γ-Al2O3 and α-Al2O3, with more γ-Al2O3 phase, As the time prolongs, the surface roughness increases, the amount of α-Al2O3 phase increases, the ceramic layer has a high microhardness (1 423HV0.1), and the corrosion resistance and wear resistance are enhanced.