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本文采用直接混合和液态混合两种不同工艺制备了石墨烯改性树脂基炭刷材料,对炭刷材料进行物理性能和载流磨损性能测试,采用SEM、EDS等方法对炭刷材料磨损面形貌及成分进行表征。结果表明:石墨烯的加入能够有效的提高炭刷材料的抗磨性能,采用直接混合2wt%石墨烯和液态混合1wt%石墨烯制备炭刷材料载流磨损率分别降低28/和38%。直接混合法加入石墨烯提高了炭刷强度,减少了磨屑的产生,石墨烯能够调节炭刷磨损面,提高炭刷材料的润滑性能,降低磨抿液态混合法加入石墨烯增强了炭刷材料的韧性,有助于炭刷表面复合润滑膜的形成,避免了磨屑产生,有效降低磨损。
In this paper, graphene modified resin-based carbon brush materials were prepared by direct mixing and liquid mixing. Physical properties and current-carrying wear properties of carbon brush materials were tested. SEM, EDS and other methods were used to evaluate the wear- Appearance and composition of the characterization. The results show that the addition of graphene can effectively improve the anti-wear properties of carbon brushes. The direct current wear rate of 2wt% graphene and liquid mixed 1wt% graphene were reduced by 28% and 38% respectively. The addition of graphene by direct mixing increases the strength of carbon brushes and reduces the generation of wear debris. Graphene can adjust the wear surface of carbon brushes to improve the lubricity of carbon brush materials and reduce the friction stir. Adding graphene by liquid mixing method enhances the carbon brush material Toughness, contribute to the formation of composite lubricating film on the carbon brush surface, to avoid wear debris, reduce wear and tear effectively.