纳米粒子对Ni-Ti复合镀层摩擦学特性的影响

Effect of Nanometer Particles on Tribological Properties of Ni-Ti Composite Coatings

用化学复合镀方法制备含碳纳米管(CNTs)和纳米稀土氧化物Ni-Ti纳米复合镀层,研究纳米粒子含量对纳米复合镀层摩擦磨损性能的影响,并用扫描电子显微镜SEM对纳米镀层进行分析,并测定纳米复合镀层的显微硬度,利用AES能谱分析其磨损机制。结果表明:随着纳米粒子含量的增加,纳米复合镀层的显微硬度增加,摩擦因数降低,耐磨性能提高;质量分数为1.5%的纳米复合镀层的摩擦因数最低,并显示优良的耐磨性能。

The Ni-Ti nano-composite coatings containing carbon nano-tube and nanometer rare earth oxide were prepared by nano-composite chemical coating technique. The effect of nano-particles content on the friction and wear behaviors of nano-composite coating was studied. Microhardness of Ni-Ti coating and Ni-Ti-based composite coating was detected . The worn surface of the nano-composite coatings was analyzed using a transmission electron microscope. The antiwear caotings were detected by AES. The results show that the nano-particles of carbon nano-tube and rare earth oxide contribute to decrease the friction coefficient to some extent and to reduce the wear mass loss significantly. The nano-composite coatings with a nano-particles content of 1.5 % have excellent wear-resistance, high microhardness and the lowest friction coefficient.