摘要
以聚醚醚酮(PEEK)为基础材料,为发挥其优异的耐疲劳性,耐磨性和自润滑性,以期研发一种新型高耐磨导电受电弓滑板复合材料。设计采用PEEK和电解铜粉(微米级)及少量短切碳纤维(CF)等成分,通过干燥-共混-冷压-烧结-冷却的成型工艺制备了不同比例的PEEK/Cu,PEEK/Cu/CF复合材料,并对其摩擦学性能、导电性能、微观结构进行了研究。结果表明,PEEK/Cu复合材料中,随着电解铜粉含量的增加,摩擦系数先减小后增大,磨损量先减小再增加;当电解铜粉含量为50%时,其复合材料的摩擦系数和磨损量均最小;当电解铜粉含量达60%时,该材料的体积电阻率为6.05×10^-5Ω·m,表现出良好的导电性。PEEK/Cu/CF复合材料中,当电解铜粉含量大于40%时,随着电解铜粉含量的增加摩擦系数先增大后减小,磨损量先增大后减小;当电解铜粉含量为50%时,其摩擦系数和磨损量均最大;随着电解铜粉含量的增加,其复合材料的体积电阻率逐渐减小后趋于平稳。综合耐磨性和导电性等特性,含50%~55%电解铜粉的PEEK基复合材料可以用作受电弓滑板制作材料,也可望用作航空航天轻质、屏蔽材料。
Polyetheretherketone(PEEK)was used as the base material to exert its excellent fatigue resistance,wear resistance and self-lubrication to develop a new composite material of high wear-resistant conductive pantograph skateboard.Designed using PEEK,electrolytic copper powder(micron grade)and a small amount of chopped carbon fiber(CF)and other components,through the drying-blending-cold pressing-sintering-cooling molding process,different ratios of PEEK/Cu,PEEK/Cu/CF composites were studied for their tribological properties,electrical conductivity,and microstructure.The results show that as the content of electrolytic copper powder in PEEK/Cu composites increases,the friction coefficient decreases first and then increases,and the amount of wear first decreases and then increases.When the content of electrolytic copper powder is 50%,both the friction coefficient and the amount of wear are the smallest.When the content of electrolytic copper powder reaches 60%,the volume resistivity of material is 6.05×10^-5Ω·m,which showes good electrical conductivity.When the content of electrolytic copper powder is greater than 40%in PEEK/Cu/CF composites,the friction coefficient first increases and then decreases,and the amount of wear increases first and then decreases with the increase of electrolytic copper powder content.When the electrolytic copper powder content is 50%,the friction coefficient and abrasion amount are the largest.As the content of electrolytic copper powder increases,the volume resistivity of the composite material gradually decreases and then stabilizes.Comparing abrasion resistance and electrical conductivity,PEEKbased composite material containing 50%-55%electrolytic copper powder can be used as a pantograph skateboard material,and it is also expected to be used as a lightweight and shielding material for aerospace field.
作者
扶肖肖
宋桂珍
郭晓君
吴翔
杨慧君
Fu Xiaoxiao;Song Guizhen;Guo Xiaojun;Wu Xiang;Yang Huijun(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2020年第2期1-5,12,共6页
Engineering Plastics Application
基金
国家自然科学基金项目(51341006)
山西省自然科学基金项目(2013011024-1)
太原理工大学大学生创新创业项目(SD18200009)
关键词
受电弓滑板
聚醚醚酮改性
电解铜粉
短切碳纤维
摩擦磨损
pantograph skateboard
polyetheretherketone modification
electrolytic copper powder
chopped carbon fiber
friction and wear
作者简介
通讯作者:宋桂珍,硕士生导师,博士,研究方向为新材料,机械设计及理论,E-mail:gzh_s@163.com。
