纳米TiO2与炭纤维协同填充PTFE复合材料的摩擦磨损性能
摘 要:考察了不同含量的纳米二氧化钛对炭纤维／聚四氟乙烯复合材料摩擦磨损性能的影响，采用扫描电子显微镜、光学显微镜分析了磨损面、磨屑及对偶面转移膜形貌，并探讨了其磨损机理。结果表明。纳米TiO2与炭纤维能够很好地协同增强聚四氟乙烯，改变磨屑形成机理．有利于形成均匀致密的转移膜，明显提高CF／PTFE复合材料的耐磨性。当纳米TiO2含量为5％时，10％CF／PTFE复合材料表现出最佳的耐磨性，耐磨性又提高了2，77倍，而磨屑尺寸只有未加时的1／20。Abstract:The friction and wear properties of CF/PTFE composites filled with different content nano-TiO2 have been studied in this article. The worn surfaces were investigated by SEM, the abrasive dust and transfer films were studied by optical microscope. Also the abrasion mechanism of CF/PTFE composites filled with nano-TiO2 was discussed. The results reveal that nano-TiO2 and carbon fiber can cooperate with each other in their dimension, and the composites filled with proper contents of nano-TiO2 and carbon fiber can show obvious tribological synergistic effects. Nano-TiO2 in the CF/PTFE composites is helpful to form uniform and compacted transfer film, and changes the formation mechanism of abrasive dust, which greatly improves the wear resistance of PTFE composites. The composite filled with 10%CF and 5% nano-TiO2 has the best wear resistance, the wear resistance increases 2. 77 times and the size of the abrasive dust is only 1/20 of that composite without nano-TiO2. 谢谢分享
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