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对纳米碳化钛(TiC)填充的聚四氟乙烯(PTFE)复合材料进行力学与摩擦学性能测试,研究纳米TiC质量分数、偶联剂处理对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,探讨复合材料增强机理。研究结果表明:纳米TiC的填充能提高PTFE复合材料的硬度、拉伸强度和耐磨性,但其冲击强度和减摩性能有所下降;偶联剂处理纳米TiC后,复合材料的拉伸强度、冲击强度、减摩性能有所提高。拉伸断口的微观分析表明:偶联剂处理纳米TiC在PTFE基体中有较好的分散性,与基体界面结合较好。
The mechanical and tribological properties of TiC-filled PTFE composites were tested. The effects of nano-TiC mass fraction and coupling agent treatment on the mechanical properties and friction and wear properties of PTFE composites were investigated. Electron microscopy (SEM) was used to observe the tensile fracture morphology and investigate the mechanism of composite strengthening. The results show that the nano-TiC filler can improve the hardness, tensile strength and wear resistance of PTFE composites, but the impact strength and friction reducing performance of the PTFE composites decrease. After the coupling agent treated nano-TiC, the tensile strength , Impact strength, anti-friction performance has improved. The microscopic analysis of the tensile fracture shows that the coupling agent treated nano-TiC has good dispersibility in the PTFE matrix and better bonding with the matrix interface.