【摘要】 采用化学镀技术制备了不同氧化铝含量的Ni-P复合镀层，并用球盘式磨损试验机测试了镀层的摩擦磨损性能。利用扫描电镜、光学显微镜和X射线衍射仪对镀层和对偶球的表面形貌、成分及微观结构进行了表征，分析了镀层的磨损机理。结果表明：镀层中氧化铝质量分数最高可达34.7%，但镀层磷含量显著降低，Ni-P合金基体为无定形结构；镀层的摩擦因数（约为0.49⁰.58）高于Ni-P合金，且随着氧化铝含量的增加先降低后增加，镀层的维氏硬度从5020 MPa上升至7640 MPa，磨损率从1.2×10^-14m³/（N·m）单调下降至3.2×10^-15 m³/（N·m），镀层的主要磨损机理由粘着磨损逐步转变为磨粒磨损。更多还原

【Abstract】 Ni-P composite coatings with various contents of Al₂ O₃ particles were prepared by an electroless plating technique and the tribological properties of the coatings were evaluated by a ball-on-disc wear instrument. The morphology, microstructure and chemical composition of the coatings and the counterpart balls were characterized by scanning electron microscopy（SEM）, optical microscopy（OM）, energy disperse spectrum（EDS）, and X-ray diffraction（XRD）technique, and the wear mechanisms were discussed. The results show that the maximum content of Al2 O3 in the composite coating is about 34.7 wt%, the phosphorus content of the coatings decreases greatly, and the Ni-P matrix of the composite coatings remain amorphous. The friction coefficient of the coatings is about 0.49⁰.58 and higher than that of Ni-P coating. With the increase of Al₂ O₃ content in the coatings, the friction coefficient decreases at first and increases later, the micro-hardness of the coatings linearly increases from 5020 MPa to 7640 MPa, and the wear rate of the coatings monotonously decreases from 1.2×10^-14m3^·（N·m）^-1to 3.2×10^-15m³·（N·m）^-1, and the major wear mechanism of the coatings changes from adhesive wear to abrasive wear.更多还原