Currently, nanoparticles have been widely used as lubricant additives, few researches have investigated their applications as additives for lubricating grease. In this paper, mixtures of ZnO and Si₃N₄ nanoparticles were added into grease as additives. XRD and TEM were utilized to the investigate phase composition, microstructure and morphology of the nanomaterials. The composite grease was prepared by introducing ZnO and Si₃N₄ nanoparticles into the grease matrix through ultrasonic dispersion. Then, tribological properties of the composite grease were measured through a MMW-1A universal friction tester. Results showed that the best lubrication performance was achieved when the composite grease contains 1 wt% ZnO and 0.5 wt%Si₃N₄. Under this condition, the friction coefficient and wear scar diameter decreased to 0.0701 and 0.727, which is 34.3% and 8.3% lower than that of the base greases, respectively. The morphology of composite nanoparticles is beneficial to the enhancement of antifriction property, which can be seen from SEM images. In addition, EDS analysis illuminated the accumulation of Zn and Si on the friction surface. Further researches proved its great potentials in alleviation of vibration, noise and temperature rise for high speed bearings, since the ZnO-Si₃N₄ nanoparticles-based composite grease showed excellent lubrication and antifriction properties.

当前，纳米颗粒已被广泛用作润滑剂添加剂，很少有研究研究其作为润滑脂的添加剂的应用。在本文中，将ZnO和Si ₃ N ₄纳米颗粒的混合物作为添加剂添加到润滑脂中。XRD和TEM被用来研究纳米材料的相组成，微观结构和形态。通过超声分散将ZnO和Si ₃ N ₄纳米粒子引入润滑脂基体中制备复合润滑脂。然后，通过MMW-1A万能摩擦测试仪测量复合润滑脂的摩擦学性能。结果表明，当复合润滑脂含量为1 wt％时，润滑效果最佳。％的ZnO和0.5重量％的Si ₃ Ñ ₄。在这种条件下，摩擦系数和磨痕直径减小到0.0701和0.727，分别比基础润滑脂低34.3％和8.3％。从SEM图像可以看出，复合纳米颗粒的形态有利于增强减摩性能。此外，EDS分析显示了摩擦表面上锌和硅的积累。进一步的研究证明了其在减轻高速轴承的振动，噪音和温升方面的巨大潜力，因为ZnO-Si ₃ N ₄纳米颗粒基复合润滑脂具有出色的润滑和减摩性能。