| 引用本文: | 姚光督,王文东,沈景凤,杜鸣杰,司明明.PTFE微粉/CF改性PEEK复合材料的摩擦磨损性能[J].材料科学与工艺,2018,26(3):59-65.DOI:10.11951/j.issn.1005-0299.20170115. |
| YAO Guangdu,WANG Wendong,SHEN Jingfeng,DU Mingjie,SI Mingming.The friction and wear properties of PEEK composites modified by PTFE micropowder and carbon fiber[J].Materials Science and Technology,2018,26(3):59-65.DOI:10.11951/j.issn.1005-0299.20170115. |
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| PTFE微粉/CF改性PEEK复合材料的摩擦磨损性能 |
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姚光督1,2,王文东2,3,沈景凤1,杜鸣杰2,司明明2
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(1.上海理工大学 机械工程学院,上海 200093;2.上海材料研究所,上海 200437; 3.上海市工程材料应用评价重点实验室,上海 200437)
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| 摘要: |
| 为解决核电水循环系统中鼓型旋转滤网驱动装置的耐腐蚀问题，本文研究了碳纤维和聚四氟乙烯微粉改性的聚醚醚酮复合材料在干摩擦、水润滑和油润滑条件下的摩擦磨损性能.通过机械共混、高温模压的方法，制备了不同质量分数的聚四氟乙烯(PTFE)微粉/碳纤维(CF)/二硫化钼(MoS2)/聚醚醚酮(PEEK)复合材料.采用拉伸试验机和塑料洛氏硬度计测试其力学性能，采用摩擦磨损试验机测试了复合材料在干摩擦、水润滑和油润滑条件下的摩擦磨损性能，采用扫描电子显微镜对其摩擦表面形貌进行分析.结果表明：复合材料在水润滑和油润滑时摩擦系数及磨痕宽度均较小，但水润滑时摩擦系数波动幅度较大且磨痕宽度略高；复合材料在干摩擦条件下的磨损机制以磨粒磨损为主，伴有疲劳磨损，油润滑时摩擦面可形成连续的润滑膜而保持光滑，水润滑时水流冲刷破坏了摩擦面上固体润滑膜的稳定性；CF质量分数增加时，复合材料的洛氏硬度和压缩强度递增，压缩强度达到164 MPa，PTFE微粉质量分数增加时，复合材料的洛氏硬度和压缩强度递减；CF质量分数增加时，复合材料的干摩擦系数及磨痕宽度下降，PTFE微粉质量分数增加时，复合材料的干摩擦系数下降，达到0.17.
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| 关键词: 聚醚醚酮 聚四氟乙烯微粉 碳纤维 摩擦 磨损 |
| DOI：10.11951/j.issn.1005-0299.20170115 |
| 分类号:TQ327.8 |
| 文献标识码:A |
| 基金项目:上海市经济和信息化委员会上海市军民结合专项(JM20146201202). |
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| The friction and wear properties of PEEK composites modified by PTFE micropowder and carbon fiber |
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YAO Guangdu1,2,WANG Wendong2,3,SHEN Jingfeng1,DU Mingjie2,SI Mingming2
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(1.School of Mechanical Engineering, Shanghai University of Science and Technology, Shanghai 200093, China; 2.Shanghai Research Institute of Materials, Shanghai 200437, China;3.Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai 200437, China)
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| Abstract: |
| In this paper, in order to solve the problem of corrosion resistance of drum type rotary filter drive in nuclear water circulation system, we studied the friction and wear properties of carbon fiber (CF) and polytetrafluoroethylene powders which modified polyether ether ketone composites under dry friction, water and oil lubrication. Through the mechanical blending and high temperature molding method, we prepared polyether ether ketone composite with different weight ratios of the PTFE powders, carbon fiber and molybdenum disulfide. The mechanical properties were examined by a tensile testing machine and a plastic Rockwell hardness tester. The friction and wear behaviors of the composites under dry friction, water and oil lubrication were tested by friction and wear tester. Finally, we analyzed the surface morphology of the friction surface by scanning electron microscopy (SEM). The results indicate that the friction coefficient and the wear width of the composites are small for the water and oil lubrication whereas the friction coefficient exhibits large fluctuation and the wear width is larger under water lubrication. The wear mechanism of composite materials is mainly abrasive wear accompanied by fatigue wear under dry friction condition. The friction surface can form continuous lubrication film and keep smooth under oil lubrication whereas the flow erosion destroys the stability of the solid lubrication film on the friction surface under water lubrication. As the mass fraction of CF increased, both the Rockwell hardness and compressive strength of the composites increased, and the compressive strength reached 164 MPa. As the mass fraction of PTFE powders increased, both the Rockwell hardness and compressive strength of composites decreased quickly. As the mass fraction of CF increased, the dry friction coefficient and the wear width of the composites decreased. Meanwhile when the mass fraction of PTFE powders increased, the dry friction coefficient of the composites decreased to 0.17.
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| Key words: polyetheretherketone polytetrafluoroethylene micro-powder carbon fiber friction wear |
