摘要
采用模压成型法制备纳米Si3N4或SiC与纳米Al2O3混合填充的聚四氟乙烯(PTFE)复合材料,研究不同质量分数的纳米Si3N4或SiC与5%纳米Al2O3混合填充对PTFE复合材料力学与耐磨性能的影响,利用扫描电子显微镜(SEM)观察复合材料拉伸断面的微观结构,探讨其增强机理。结果表明:纳米Si3N4或SiC与Al2O3混合填料均能使PTFE复合材料的硬度和耐磨性提高,且填充Si3N4/Al2O3的PTFE复合材料的硬度、拉伸性能、冲击强度和耐磨性均优于填充SiC/Al2O3的,其中5%Si3N4与Al2O3混合填充的PTFE复合材料有较好的综合性能。微观分析表明:Si3N4/Al2O3在PTFE基体中分散性较好,说明Si3N4与Al2O3具有较好的协同作用。
Polytetrafluoroethylene （PTFE） composite filled with nano-Si3N4 or SiC and Al2O3 were prepared by compression molding. The mechanical and wear properties of PTFE composite were studied. The tensile fracture surfaces were observed by a scanning electron microscope （SEM） and the enhanced mechanism was discussed. The result showed that the fillers mixed with nano-particles could raise the hardness and wear resistance. PTFE composite filled with nano-Si3N4 and Al2O3 had higher properties of hardness, tensile strength impact strength and wear resistance than with SiC and A1203. The synthetic property of 5 % Si3N4/Al2O3/PTFE was better. The micro-analysis showed that nano-Si3N4 and A12 03 had a better dispersion in the PTFE matrix and the synergy of Si3 N4 and Al2O3 was better.
出处
《塑料》
CAS
CSCD
北大核心
2011年第3期51-53,25,共4页
Plastics
基金
江苏省农机基金资助项目(gxz07011)
