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300 N,摩擦速度提升至3 m/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。
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 3 D 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. NanoZrC 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.
作者
曹文翰
龚俊
杨东亚
祁渊
王宏刚
高贵
Wenhan Gao;Jun Gong;Dongya Yang;Yuan Qi;Honggang Wang;Gui Gao(School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2018年第2期48-55,共8页
Polymer Materials Science & Engineering
基金
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)
关键词
纳米碳化锆
聚苯硫醚
聚四氟乙烯
摩擦磨损
转移膜
nano-ZrC
polyphenylene sulfide
polytetrafluoroethylene
tribological behavior
transfer film
