中文摘要：

研究电沉积Ni-P/纳米Al2O3复合镀层的干摩擦磨损性能和耐铝液侵蚀性能,采用扫描电镜（SEM）观察Ni-P/纳米Al2O3复合镀层的磨损表面形貌以及铝与Ni-P/纳米Al2O3复合镀层的界面结构。结果表明：Ni-P/纳米Al2O3复合镀层（镀态）与淬火45钢对摩时的摩擦因数为0.45～0.55,磨损表现为疲劳剥落;经400℃热处理后,Ni-P/纳米Al2O3复合镀层与淬火45钢对摩的摩擦因数为0.20～0.24,磨损机理表现为轻微粘着和磨蚀;铝液在Ni-P/纳米Al2O3复合镀层表面的润湿角为109,Ni-P/纳米Al2O3复合镀层具有良好的耐铝液侵蚀性能。

英文摘要：

The tribological properties under dry sliding condition and erosion resistance of Ni-P/nano-Al2O3 composite coatings pulse electroplated to aluminum liquid were investigated.The worn surface morphologies of the coatings and the interface structures between aluminum and Ni-P/nano-Al2O3 composite coatings were observed by scanning electron microscopy（SEM） .The results demonstrate that the friction coefficient of the as-deposited composite coatings against quenched 45 steel is 0.45-0.55;its wear mechanism is fatigue flake.The friction coefficient of 400℃heat-treated composite coatings against quenched 45 steel is 0.20-0.24;their worn surfaces exhibit slight adhesion and abrasion.The wetting angle of the aluminum liquid on the composite coatings is 109,showing that the composite coatings present good erosion resistance to the aluminum liquid.