ZL101A铝合金表面微弧氧化陶瓷层的摩擦磨损性能

摘要

在ZL101 A铝合金表面制备了微弧氧化陶瓷层,采用扫描电镜、X射线衍射仪、显微硬度计、高温摩擦磨损试验机等研究了该陶瓷层的显微组织、物相组成、显微硬度和摩擦磨损性能.结果表明：微弧氧化陶瓷层主要由α-Al2 O3和γ-Al2 O3相组成,其层厚约60μm,表层疏松、内层致密；该陶瓷层的平均硬度为1740．9 HV,远高于 ZL101A 铝合金的150．2 HV,摩擦因数与磨损质量损失均小于ZL101 A铝合金的,其磨损机理主要为磨粒磨损.%The micro-arc oxidation layer was prepared on the surface of ZL101A aluminum alloy.The microstructures,phase composition,microhardness and friction and wear properties of the ceramic layer were studied by using the scanning electron microscope,X-ray diffractometer,microhardness tester,high-temperature friction and wear testing machine,etc,the results show that the micro-arc oxidation ceramic layer with the thickness of about 60μm was composed ofα-Al2 O3 andγ-Al2 O3 phases.The surface layer was loose and inner layer was dense.The average microhardness of the ceramic was 1 740.9 HV,which was much higher than 150.2 HV of ZL101A aluminum alloy.The friction coefficient and wear mass loss were both lower than those of ZL101A aluminum alloy.The abrasive wear was the main friction and wear mechanism.