论文部分内容阅读
以纳米碳化硅(SiC)、微米SiC及粉状SiC纤维填充聚四氟乙烯(PTFE)复合材料,对PTFE复合材料进行力学和摩擦学性能测试,分析对比不同粒径填料及其质量分数对PTFE复合材料力学和摩擦磨损性能的影响,用扫描电子显微镜(SEM)对拉伸断口形貌进行观察,探讨了复合材料增强机理。对比研究结果表明:不同粒径的SiC均能提高复合材料的硬度和耐磨性,SiC纤维/PTFE复合材料有较高的拉伸强度和断裂伸长率,其综合性能最好。拉伸断口的微观分析表明:SiC纤维与PTFE界面粘结性能较好,对PTFE复合材料性能有一定的增强效果。
The mechanical and tribological properties of PTFE composites were tested by filling polytetrafluoroethylene (PTFE) composites with nano-SiC, SiC and powdered SiC fibers. The effects of different fillers and their mass fractions on the properties of PTFE Composite mechanics and friction and wear properties. The morphology of tensile fracture was observed by scanning electron microscope (SEM), and the mechanism of composite reinforcement was discussed. The results of the comparative study show that SiC with different particle sizes can improve the hardness and wear resistance of the composites. The SiC fiber / PTFE composites have higher tensile strength and elongation at break, and have the best comprehensive properties. The microscopic analysis of the tensile fracture shows that the bonding properties between SiC fiber and PTFE are better and the performance of PTFE composite is enhanced to some extent.