采用化学镀技术制备不同纳米氧化铝含量的Ni-P-Al2O3复合镀层,并利用扫描电子显微镜(SEM)、X射线能谱仪(EDS)和X射线衍射仪(XRD)对镀层的表面形貌、化学成分及微观结构进行表征,考察镀层在600℃下的高温氧化性能,并采用高温摩擦磨损试验机对镀层在200℃和600℃下的摩擦磨损性能进行测试,分析其磨损机理.结果表明:纳米氧化铝的加入可有效提高镀层的高温耐磨性能和抗高温氧化性能.随着镀液中纳米Al2O3用量的增加,镀层的氧化质量增加,摩擦因数先减少后增加,镀层的磨损机理发生变化.镀液中纳米Al203用量为3g/L时,镀层具有优异的抗高温氧化性能、较低的摩擦因数和较低的磨损率.复合镀层在较高温度磨损过程中呈现出较高的磨损率和较低的摩擦因数.
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