摘要
研究了含有固体润滑剂的炭纤维增强 PI复合材料在干摩擦和水润滑 2种状态下的摩擦磨损性能及其磨损机理 .结果表明 ,在水润滑条件下 ,摩擦系数和磨损率都有不同程度的降低 ,其中含 PTFE的炭纤维增强 PI复合材料的耐磨性最佳 ,最低磨损率为 9.9× 10 - 7mm3/ N· m.其主要原因可能与材料存在极性酰胺基团有关 ,酰胺基易通过氢键与水分子结合 ,在摩擦表面形成水吸附膜 ,使摩擦表面直接接触减少 。
Polyimide based composites filled with various solid lubricants and reinforced with carbon fiber were prepared by compression molding. The tribological behavior of the composites sliding against steel under water lubrication was comparatively investigated with that under dry sliding. The wear mechanism was comparatively examined as well. As the results, the PI based filled composites sliding against stainless steel register lower friction coefficients and wear rates in water than in air. The lowest wear rate is recorded as 0.99×10 -6 mm 3 /N·m for the PTFE filled PI composite. The lowered wear rate of PI based composites could depend on the polar imide radical in the composite molecules. In other words, the polar imide radicals could link with water molecules by hydrogen bond. Consequently an adsorbed film of water could form to keep off the direct contact between the frictional pair sliding surfaces. Therefore a decreased wear rate of the composites would be observed.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2002年第4期273-276,共4页
Tribology
基金
国家自然科学基金资助 (5 992 5 5 13 )
浙江大学流体传动及控制国家重点实验室开放课题资助 (990 5 )
中国科学院国防创新基金资助(2 0 0 1)
关键词
聚酰亚胺
炭纤维
复合材料
水润滑
摩擦学
性能
polyimide
carbon fiber
composite
water environment
tribological behavior
