碳纤维增强聚酰亚胺在海水润滑下的摩擦学性能  

Tribological Behavior of Carbon Fiber Reinforced Polyimide under Seawater Lubrication

作　　者：张志远[1] 聂松林[1] 张振华[1] 张立茂[1] 杨宏磊[1] 

机构地区：[1]北京工业大学机电学院,北京100124

出　　处：《润滑与密封》2016年第11期78-82,共5页Lubrication Engineering

基　　金：国家863计划项目(2012AA091103);国家自然科学基金项目(51375018;11572012);北京市人才强教计划项目(CIT&TCD 20130316)

摘　　要：利用MCF-10耐海水腐蚀摩擦磨损试验机考察不同含量碳纤维(CF)增强的聚酰亚胺(PI)聚合物在海水润滑条件下的摩擦磨损性能,并利用扫描电子显微镜(SEM)观察磨损表面形貌,分析材料磨损机制。结果显示,CF填料能够有效地提高PI在海水中的耐磨性,其耐磨性能随着CF添加量的增加先上升后下降,当CF体积分数为20%时,PI复合材料的抗磨性能最好,这是因为耐磨性好的CF承担了摩擦过程中的大部分载荷,抑制了PI的磨损;CF的加入增强了PI复合材料对对偶面的刮擦和犁耕作用,导致摩擦因数升高并出现较大幅度的振荡,不同CF添加量的PI复合材料的摩擦因数差不大;纯PI的磨损主要表现为黏着磨损和机械犁耕,CF增强PI的磨损主要是基体的磨粒磨损和填料的磨平和折断。The tribological behaviors of polyimide （PI） polymer reinforced with different volume content of carbon fiber （CF） in seawater lubrication were studied by using seawater resistant MCF-10 test rig.The worn surface mOrphology of PI composites was observed by scanning electron microscope （SEM） for analyzing the wear mechanism of PI material.The re- sults show that CF can effectively improve the wear resistance of PI polymer in seawater.With the increasing of CF content, the wear resistance of PI composite is firstly increased and then decreased, and it has the best wear resistance when CF content is 20% in volume.This is mainly because that CF can bear a large proportion of contacted load in the process of friction,inhibiting the further wear of PI composite.The additive CF enhances the scratch and plough effect of PI compos- ites on coupling surface,leading to the increase and a larger amplitude of oscillation of friction coefficient, while the CF content has little influence on the friction coefficient of PI composite.The main wear mechanism of pure PI material is shown as adhesive wear and mechanical plough, and that of CF reinforced PI polymer is abrasive wear of matrix and grind and fracture of CF.

关 键 词：碳纤维 聚酰亚胺 摩擦 磨损 海水润滑 

分 类 号：TH117.1[机械工程—机械设计及理论]