纳米氧化铝改性聚四氟乙烯的摩擦磨损性能研究

四氟

纳米氧化铝改性聚四氟乙烯的摩擦磨损性能研究
牛永平 韩明 杜三明 张军凯 张永振河南科技大学材料摩擦学重点实验室,洛阳471003

摘　要:以纳米Al2O3作为填料填充改性聚四氟乙烯（PTFE）,采用模压烧结成型的方法制备了不同纳米Al2O3含量的PTFE/纳米Al2O3复合材料,考察了偶联剂改性前后纳米Al2O3及其含量对复合材料硬度、摩擦系数和磨痕宽度的影响,并利用扫描电子显微镜对复合材料的磨屑和磨损表面进行了微观分析。结果表明,随着纳米Al2O3含量的增加,复合材料的硬度和摩擦系数逐渐增大,磨痕宽度先大幅下降而后略有增加。另外,相对于未改性纳米Al2O3,PTFE/偶联剂改性纳米Al2O3复合材料的硬度和摩擦系数均较低,其磨痕宽度则较高。[著者文摘]

关键词:Al2O3 聚四氟乙烯 纳米复合材料 摩擦磨损性能
分类号:　TQ133.1[机标]文献标识码：A文章编号：栏目信息：测试
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FRICTION AND WEAR PROPERTIES OF PTFE FILLED WITH NANO-Al2O3Niu Yongping,Han Ming,Du Sanming,Zhang Junkai,Zhang YongzhenKey Laboratory of Materials Tribology,Henan University of Science and Technology,Luoyang 471003,ChinaAbstract: Polytetrafluoroethylene（PTFE） was filled with nano-Al2O3 as filler and PTFE/nano-Al2O3 composites with different content of nano-Al2O3 were prepared by compression sintering molding.The effects of nano-Al2O3 and its content before and after treating on the hardness,friction coefficient and wear scar width of the composites were investigated.Wear debris and worn surface of composites were analyzed by scanning electron microscopy.The results showed that with increasing of content of nano-Al2O3,the hardness and friction coefficient of composites augmented gradually and the wear scar width first decreased largely and increased slightly afterward.Otherwise,comparing with unmodified nano-Al2O3,the hardness and friction coefficient of PTFE/nano-Al2O3 modified by coupling agent composite were lower and the wear scar width was larger.[著者文摘]

Key words:Al2O3; PTFE; nanocomposites; friction and wear behavior