文章摘要
纳米碳化锆改性填充聚四氟乙烯-聚苯硫醚复合材料摩擦磨损性能
Tribological Behavior of Nano-ZrC Reinforced Polytetrafluoroethylene-Polyphenylene Sulfide Composites
  
DOI:10.16865/j.cnki.1000-7555.2018.02.009
中文关键词: 纳米碳化锆  聚苯硫醚  聚四氟乙烯  摩擦磨损  转移膜
英文关键词: nano-ZrC  polyphenylene sulfide  polytetrafluoroethylene  tribological behavior  transfer film
基金项目:国家自然科学基金资助项目(51165022);甘肃省自然科学基金资助项目(1606RJZA166)
作者单位
曹文翰1,龚 俊1,杨东亚1,祁 渊1,王宏刚2,高 贵2 1.兰州理工大学 机电工程学院,甘肃 兰州 730050
2.中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃 兰州 730000 
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中文摘要:
      采用冷压成型烧结工艺法,制备纳米碳化锆(Nano-ZrC)与聚苯硫醚(PPS)填充改性聚四氟乙烯(PTFE)基复合材料。采用邵氏硬度仪、万能材料试验机、扫描电镜分别表征了复合材料的显微结构及力学特性;使用MRH-3型环-块摩擦磨损试验机测试了复合材料在不同实验条件下的摩擦学性能,并通过非接触3D轮廓仪及X射线光电子能谱仪对磨损表面及转移膜进行了检测分析。结果表明:随着纳米碳化锆含量的增加,复合材料硬度上升,拉伸强度、断裂伸长率及冲击强度下降;纳米碳化锆使得复合材料耐磨性得到显著提升,且其体积分数为5%时复合材料摩擦学性能最佳;纳米碳化锆增强了转移膜的物理粘附能力,并促进其化学吸附作用;当载荷提升至300N,摩擦速度提升至3m/s时,复合材料摩擦磨损性能大幅降低,转移膜形貌发生明显变化;环境温度(25~140℃)对复合材料摩擦磨损性能影响不明显。
英文摘要:
      The polytetrafluoroethylene(PTFE) composites filled with polyphenylene sulfide(PPS) and nanometer zirconium carbide(Nano-ZrC) were prepared by cold forming and sintering method. The microscopic structure and mechanical properties were characterized by Shore durometer, universal material testing machine and scanning electronic microscopy. The tribological behavior of composite was tested by MRH-3 block-on-ring friction and wear tester under difference conditions. The transfer film on counterpart GCr15 ring was inspected by non-contact 3D optical interferometer and X-ray photoelectron spectroscopy. The results show that the hardness of the composite is improved with increase of the content of Nano-ZrC, but the tensile strength, impact strength and elongation of the composites are decreased. Nano-ZrC makes the wear-resistance of composites remarkably improved and the volume fraction 5%Nano-ZrC reinforced PTFE-PPS composite has the best tribological properties. The Nano-ZrC enhances the physical adhesion ability of the transfer film and promotes its chemical adsorption.The tribological properties of composite decrease sharply when the load or sliding velocity increases to 300 N and 3 m/s, and the morphology of transfer film changes significantly. The effect of ambient temperature (25~140 ℃) on the friction and wear properties of the composites is not obvious.
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