石墨烯改性多孔聚酰亚胺轴承保持架材料性能研究  

Material Property Study on Graphene Infused Porous Polyimide Bearing Cage

作　　者：邓凯文[1] 牛荣军[1] 孙小波[2] 郭军力 邓四二[1,4,5] DENG Kaiwen;NIU Rongjun;SUN Xiaobo;GUO Junli;DENG Sier(College of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471003,Henan,China;Luoyang Bearing Research Institute Co.,Ltd.,Luoyang 471039,Henan,China;Institute of Applied Physics,Jiangxi Academy of Sciences,Nanchang 330012,China;National United Engineering Laboratory for Advanced Bearing Tribology,Luoyang 471023,Henan,China;Collaborative Innovation Center of Major Machine Manufacturing in Liaoning,Dalian 116024,Liaoning,China)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003 [2]洛阳轴承研究所有限公司,河南洛阳471039 [3]江西省科学院应用物理研究所,南昌330012 [4]高端轴承摩擦学技术与应用国家地方联合工程实验室,河南洛阳471023 [5]辽宁重大装备制造协同创新中心,辽宁大连116024

出　　处：《材料导报》2022年第17期218-222,共5页Materials Reports

基　　金：国家科技攻关计划(JPPT-2017-147)。

摘　　要：多孔聚酰亚胺复合材料因具有良好的自润滑性而成为航天轴承保持架的主要选材。但该材料在使用过程中显现出导热性能差和易磨损等问题,缩短了轴承使用寿命,严重影响航天飞行器控制系统的可靠性。本工作通过机械混合添加石墨烯工艺制备得到了石墨烯改性多孔聚酰亚胺轴承保持架材料,并对复合材料的微观形貌与结构、导热性能和磨损性能等进行了表征与分析。结果表明,石墨烯改性多孔聚酰亚胺轴承保持架材料兼具良好的导热性能和耐磨性,当石墨烯含量为1.0%(质量分数)时,材料导热系数为0.41 W/(m·K),相比改性前提高36.9%;材料磨损率为43.25×10^(5)mm^(3)/(N·m),相比改性前提升27.3%。因此,改性后的复合材料保持架对延长航天轴承的使用寿命具有潜在的应用价值。Porous polyimide composite has become the first choice of the material of aerospace bearing cages due to its good self-lubricating property.However,its poor thermal conductivity and wear resistance can lead to the shortened bearing service life and seriously affect the reliability of the control system of the aerospace vehicle.By mechanically mixing the graphene-modified porous polyimide composite,this work studied the microstructure,tribological properties and thermal conductivity of the material.The results show that the modified porous polyimide composite has excellent tribological properties and thermal conductivity.When the content of graphene is 1.0 wt%,the thermal conductivity and the wear rate of material is 0.41 W/(m·K)and 43.25×10^(5)mm^(3)/(N·m),respectively,increasing by 36.9%and 27.3%over those of the unmodified composite material.As such,the modified composite cage has potential applications for prolonging the service life of aerospace bearings.

关 键 词：轴承 保持架 多孔聚酰亚胺 石墨烯 摩擦学 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业]