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研究电解液、电流密度和温度等阳极化条件对在Al 5745和Al 1050A基质上形成的氧化膜层摩擦因数和维氏硬度的影响。采用DELTALAB HVS-1000维氏硬度计和旋转销盘摩擦试验机测量样品的硬度和摩擦性能。结果表明:当草酸浓度为10 g/L、电流密度为3 A/dm2及温度为5°C时,样品获得最高的维氏硬度(>HV 400)和最低的摩擦因数(<0.4)。采用辉光放电发生光谱法检测在Al 5754基质上形成的阳极氧化膜层上的氧化镁含量。氧化镁对膜层的力学性能产生一系列的负作用。最后,采用SEM、EDS和AFM测定摩擦试验前后阳极氧化膜的摩擦磨损性能。结果表明,磨损机理与材料的初始形貌、膜层的化学成分(C、S和Mg)、孔隙率和内应力等诸多因素有关。
The effects of anodizing conditions such as electrolyte, current density and temperature on the friction coefficient and Vickers hardness of the oxide film formed on the Al 5745 and Al 1050A substrates were investigated. The hardness and friction properties of the samples were measured with a DELTALAB HVS-1000 Vickers hardness tester and a rotating pin plate friction tester. The results showed that when the concentration of oxalic acid was 10 g / L, the current density was 3 A / dm2 and the temperature was 5 ° C, the highest Vickers hardness (> HV 400) and the lowest friction coefficient (<0.4) were obtained. Magnesium oxide content on the anodized film formed on the Al 5754 substrate was examined by glow discharge spectroscopy. Magnesium oxide has a series of negative effects on the mechanical properties of the coatings. Finally, SEM, EDS and AFM were used to measure the friction and wear properties of the anodized film before and after the friction test. The results show that the wear mechanism is related to the initial morphology of the material, the chemical composition of the film (C, S and Mg), porosity and internal stress.