摘要
以热压成型法制备了纳米Al2 O3 和聚四氟乙烯 (PTFE)填充聚醚醚酮基 (PEEK)复合材料 ,利用销盘摩擦磨损试验机研究了干摩擦条件下纳米Al2 O3 和PTFE填充PEEK的摩擦磨损特性。结果表明 ,纳米Al2 O3 使PTFE填充PEEK复合材料的摩擦磨损特性得到明显改善 ,其改善程度与纳米Al2 O3 的填充量有关 ,当纳米Al2 O3 的含量较低 (3% )时 ,纳米Al2 O3 PTFE PEEK复合材料与钢对偶面产生的磨损模式以磨粒磨损和犁削为主 ;而当纳米Al2 O3 的含量较高 (10 % )时 ,纳米Al2 O3 填充PEEK的磨损模式主要是粘着磨损 ;纳米Al2 O3 的含量为 5 %～ 7%时 ,PEEK复合材料的摩擦系数和比磨损率最低。随着载荷的增加 ,纳米Al2 O3 PTFE
The reinforced polyetherether ketone-based blends filled with nanometer Al_2O_3 and polytetrafluoroethylene (PTFE) were prepared by heat compression molding. The friction and wear behaviors of polyetherether ketone (PEEK) composites filled with nanometer Al_2O_3 and PTFE were investigated on a pin-on-disc test rig under dry sliding against carbon steel disc. The PEEK matrix composites were filled with the different mass fraction percentage of nanometer Al_2O_3 and PTFE of 10 percent. The worn surfaces of PEEK matrix composites were observed by the scanning electron microscopy (SEM). It shows that PEEK composites filled with nanometer Al_2O_3 exhibits lower friction coefficient and specific wear rate, in comparison with the composite PTFE-PEEK of 10 percent. The lowest specific wear rate of the composites was obtained with PEEK composite filled with nanometer Al_2O_3 of 7 percent. The comprehensive tribological behavior is excellent, when the mass fractions of nanometer Al_2O_3 range from 0.05 to 0.07. The SEM micrographs of the worn surfaces indicate that PEEK composite slightly behaves adhesive wear. When the mass fraction of nanometer Al_2O_3 filled with PEEK composite is not less than 0.1,the plastic deformation of PEEK matrix in the composite will be enhanced,and the specific wear rate will increase.
出处
《石油大学学报（自然科学版）》
CSCD
北大核心
2004年第2期68-70,74,共4页
Journal of the University of Petroleum,China(Edition of Natural Science)
基金
中国石油天然气集团公司石油科技中青年创新基金资助项目
石油大学博士研究基金资助项目
