Abstract：In order to improve carbon fiber surface activity and comprehensive properties of the carbon fiber reinforced polyimide(CF／PI), rare earth solution (RES) surface modification and air-oxidation methods were used to improve the interfacial adhesion of CF／PI composite. The tribological property of the PI composites reinforced by the carbon fibers treated with different loads, reciprocating sliding frequency and surface modification methods were comparatively investigated. Results show that surface mo-dification of CF can improve friction and wear behavior of CF／PI composite. Friction coefficient, wear untreated CF／PI composite and air-oxitation CF／PI composite significantly increase with the increase of load and sliding frequency under dry sliding condition. Rare earth elements acting as surface modifier of the carbon fibers can increase interfacial adhesion and toughness between carbon fibers and PI matrix, and can improve tribological performance of the composites. In the same test conditions, the friction and wear properties of the RES treated CF／PI composite are optimal.
2011, Vol. 32 
