摘要
用机械共混和冷压成型、热烧结的方法制备了不同体积含量不同粒径的SiO2填充PTFE样品。用M－2000摩擦磨损试验机评价了不同样品在干摩擦下的摩擦学性能;用X射线能量损失谱(EDS)观察分析了摩擦前后Si元素在样品表面的分布情况。结果表明:在本实验所采用的实验条件下,SiO2/FTFE复合材料的摩擦系数随SiO2体积含量的增加而增大,抗磨损能力则有一个最佳含量;填料粒径不同,其体积填充分数对复合材料摩擦磨损性能的作用规律不同:在相同的体积分数下,粗SiO2填充PTFE的摩擦系数小于细SiO2填充PTFE的摩擦系数,且其随SiO2填充分数增加而增大的趋势远小于细SiO2填充PTFE;其具有最好抗磨能力的最佳体积填充含量也大于细SiO2的体积填充含量。SiO2这种填充作用规律可由其在PTFE基体中的形态结构特征来解释。
The composites of polytertrafluoroethylene filled with SiO2 particles of two kinds of particle size at various volume fractions wereprepared by compression molding. The friction and wear properties of the composite block in sliding against a stainless ring were evaluated on aM-2000 test rig. The surfaces and fractional surfaces of these PTFE, composites were examined by using a X-ray energy disperse spectroscopy (EDS).It has been found that when the volume fraction rise, the friction coefficient of the composites increase, while the anti-wear ability has an optimalproportion. The relationships between the volume fraction of SiO2 and the friction and wear properties of the composites differ at different particle size.
出处
《润滑与密封》
CAS
CSCD
北大核心
2002年第1期48-49,47,共3页
Lubrication Engineering
基金
中国科学院应用研究与发展资助重点项目(1999)
