碳纤维织物/环氧复合材料油润滑下摩擦学性能

采用半干法制备碳纤维织物增强环氧树脂基自润滑复合材料,研究钢背衬复合材料与45钢在环-环端面浸油润滑状态下的摩擦学特性,考查载荷、速度和碳织物类型对复合材料摩擦磨损性能的影响,并采用扫描电子显微镜对复合材料及偶件磨损表面进行观察与分析.结果表明:轻载高速启动可显著提高单向碳织物/环氧复合材料的摩擦磨损性能,边界润滑状态下的碳织物/环氧复合材料主要表现出黏着磨损特性,对偶钢环上出现的网状转移膜大大改善了材料的摩擦学性能;平纹碳织物/环氧复合材料因表面织物纹理使得润滑油能深入到摩擦表面各区域,在重载下表现出较低的摩擦系数.

Tribological Properties of Carbon Fabric/Epoxy Composite under Oil Lubrication

Carbon fabric reinforced epoxy (CF/EP) resin matrix self-lubricating composite was fabricated by semi-dry method. Tribological properties of the composite sliding against 45 steel counterpart under the configuration of ring-on-ring end faces in oil were investigated. Effects of load,sliding velocity,carbon fabric type on tribological properties of the composite were discussed. Worn surfaces of composite and its counterpart were investigated using scanning electron microscopy. Experimental results show that friction and wear property of unidirectional carbon fabric/epoxy composite improved greatly when the parts started up under the condition of light-loading and high-speed. The main wear mechanism of composite under boundary lubrication was adhesive wear. Reticular transfer films on the steel worn surface improved friction and wear property greatly. Compared with the unidirectional carbon fabric composite,plain carbon fabric/epoxy composite exhibited lower friction coefficient under heavy load. Surface morphology analysis indicates that lubricant was readily distributed on the worn surface along fabric texture.