聚四氟乙烯复合材料的摩擦学二次转移行为研究  

Study on Second Transfer of PTFE Composites under Dry Friction

作　　者：刘亮[1,2] 阎逢元[1] 王鸿灵[1] 贺晔红[3] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [2]中国科学院研究生院,北京100864 [3]沈阳黎明航空发动机(集团)有限责任公司技术中心,辽宁沈阳110043

出　　处：《润滑与密封》2010年第3期30-33,共4页Lubrication Engineering

基　　金：国家高技术研究发展计划资助项目(2007AA03Z358);甘肃省自然科学基金资助项目(0803RJZA016)

摘　　要：采用冷压成型、自由烧结工艺分别制备了青铜粉、聚酰亚胺、二硫化钼和石墨填充改性的聚四氟乙烯复合材料,在改装的M-2000型摩擦磨损试验机上考察了材料的二次转移摩擦学性能;用扫描电子显微镜对磨损表面进行观察和分析。结果表明:增加载荷有利于提高转移膜与基底的结合强度;填料种类对PTFE复合材料二次转移膜的摩擦学性能有影响,在本实验条件下(干摩擦、室温、滑动速度为0.42m/s、接触载荷为30N),以PTFE复合材料作为润滑剂提供源使用时,PTFE/MoS2、PTFE/Graphite复合材料形成的二次转移膜最好,PTFE/Bronze复合材料二次转移膜次之,PTFE/PI复合材料形成二次转移膜的能力最差。PTFE composites filled with Bronze,PI,MoS2 and Graphite were prepared by compression molding and sintering.The wear properties of PTFE composites under dry friction conditions were investigated on a reequipped M-2000 tribometer tester;the worn surfaces of the composites were examined by means of scanning electron microscopy.The results show that under the given conditions in these experiments（dry friction,room temperature,sliding speed 0.42 m/s,contact load 30 N）,the adhesion of film to the substrate increases with load.The filler type will affect tribological properties of the second transfer films formed by PTFE composites.The second transfer films formed by PTFE MoS2 composites and PTFE/ Graphite composites are prior to that of PTFE/Bronze composites and PTFE/PI composites.

关 键 词：聚四氟乙烯 复合材料 二次转移 摩擦磨损性能 

分 类 号：TB33[一般工业技术—材料科学与工程]