聚醚醚酮复合材料在不同水环境下的摩擦磨损行为  

Tribological Properties of PEEK Composites Lubricated by Water under Different States

作　　者：王万成 何彬 姜朋飞 王建章[2] WANG Wancheng;HE Bin;JIANG Pengfei;WANG Jianzhang(AECC Xi’an Engine Control Technology Co.,Ltd.,Xi’an Shaanxi 710021,China;Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou Gansu 730000,China)

机构地区：[1]中国航发西安动力控制科技有限公司,陕西西安710021 [2]中国科学院兰州化学物理研究所,甘肃兰州730000

出　　处：《润滑与密封》2019年第3期111-116,共6页Lubrication Engineering

摘　　要：为研究碳纤维/聚醚醚酮复合材料在不同水环境下的摩擦学性能,通过构建专门的试验平台以模拟不同的水环境工况,对比研究碳纤维/聚醚醚酮复合材料分别在气态、汽态(即气-液二相混合态)与液态3种水环境下自配副摩擦时的摩擦磨损性能。研究结果表明:当水处于气态时,其对复合材料几乎没有润滑效果,摩擦过程中材料出现剧烈的摩擦震荡与极高的磨损率;当水处于雾状的气-液混合态时,其对复合材料的润滑性能会有所改善,但并不能保证碳纤维/聚醚醚酮复合材料摩擦部件的长期、可靠运行;当水完全处于液态时,复合材料表现出极低且非常稳定的摩擦因数,磨损率相对于气态或气-液混合态工况分别降低3或6个数量级,表明液态水能够为聚醚醚酮复合材料提供长效、可靠的润滑保障。从磨损形貌可推断,在气态、气-液混合工况下,碳纤维/聚醚醚酮复合材料表现为严重的黏着磨损,在液态水润滑工况下,材料表现为轻微的磨粒磨损。In order to study the tribological properties of carbon fiber/polyetheretherketone (CF/PEEK) composite lubricated by water under different states,a specialized experiment platform was designed,which can simulate the working conditions with different water states.The tribological properties of CF/PEEK self-matched pairs in gaseous state,wet steam state (water vapor-droplets mixed state) and liquid state of water were studied.The results indicate that gaseous state of water has no obvious lubrication effect on CF/PEEK composite,which leads to extreme frictional oscillation and high wear rate of CF/PEEK composite.The mixture of vapor and droplets of water can improve the lubrication of CF/PEEK composite in some extent,but it can not guarantee the long-term and reliable operation of CF/PEEK composite friction parts.Under the lubrication of liquid water,the CF/PEEK composite exhibits very low and stable friction coefficient,and the wear rate of CF/PEEK composite is decreased by 3 to 6 orders of magnitude compared with the wear rate under the lubrication of gaseous state of water or gas/steam mixed state of water.Based on surface morphology of worn surfaces,it is concluded that severe adhesive wear occurs under the lubrication of gaseous state and wet steam state of water,while slight abrasive wear occurs under the lubrication of liquid water.

关 键 词：聚醚醚酮 碳纤维 复合材料 水润滑 摩擦磨损 

分 类 号：TH117.1[机械工程—机械设计及理论]