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合成了表面修饰S iO2纳米微粒,利用四球摩擦磨损试验机考察了S iO2纳米微粒作为锂基脂添加剂的摩擦磨损行为,用扫描电子显微镜、能量色散谱仪和X射线光电子能谱仪对钢球磨损表面进行了分析.结果表明:S iO2纳米微粒作为锂基脂添加剂具有良好的抗磨损性能,能够显著提高锂基脂的失效载荷.这是由于在摩擦过程中,S iO2纳米微粒富集在磨损表面并形成边界润滑膜,对磨损表面起到修复作用,从而使得锂基脂的抗磨和承载能力明显提高.
The surface-modified SiO 2 nanoparticles were synthesized. The friction and wear behavior of SiO 2 nanoparticles as a lithium grease additive was investigated by means of a four-ball friction and wear tester. The wear behavior of the SiO 2 nanoparticles was evaluated by scanning electron microscopy, energy dispersive spectroscopy and X-ray photoelectron spectroscopy The wear surface was analyzed.The results show that: S iO2 nanoparticles as a lithium grease additive has good wear resistance, can significantly increase the lithium grease failure load.This is due to the friction process, S iO2 nanoparticles enrichment in Wear the surface and form a boundary lubrication film, play a repair role on the wear surface, so that the anti-wear and bearing capacity of lithium grease increased significantly.