摘要
以竹纤维为增强相,通过稀土化合物改性制备一种树脂基复合材料;采用环块式摩擦磨损实验,研究稀土化合物改性复合材料在油润滑状态下载荷、转速对试样摩擦学性能的影响,以及稀土化合物改性对复合材料试样摩擦学性能的影响;比较干摩擦状态和油润滑状态下复合材料的摩擦学性能,观察和分析试样磨损表面形貌,探讨其磨损机制。实验结果表明:油润滑条件下,稀土化合物改性复合材料的摩擦因数和磨损率都随着载荷的增大而增加;较高载荷下摩擦因数随着转速的增大先增加后减小,而磨损率则呈现逐步增加的趋势;稀土化合物的改性使竹纤维和基体界面结合更为紧密,提高摩擦因数的同时降低了磨损率;在油润滑作用下,试样磨损由干摩擦时的磨粒磨损和疲劳磨损转变成为轻微的疲劳磨损;在油润滑状态下,复合材料处于边界润滑状态,故摩擦因数和磨损率均低于干摩擦。
A resin matrix composite was prepared by modifying with rare earth(RE)compound and using bamboo fiber as reinforcing phase.The effect of load and rotating speed on the tribological performance of RE compound modified composite under oil lubrication condition,and the effect of RE compound modification on the tribological performance of composite were studied by ring-block friction and wear tests.The tribological properties of the composite under dry friction and oil lubrication were compared.The wear mechanism was analyzed by observation of the worn surface morphology.The experimental results show that under the condition of oil lubrication,the friction coefficient and wear rate are increased with the increasing of load.Under the heaver load,the friction coefficient is increased first and then decreased with the increasing of the rotating speed,while the wear rate is increased gradually.The modification of the RE compound makes the interface between the bamboo fiber and the matrix more tight,and the friction coefficient is improved while the wear rate is reduced.Under the action of oil lubrication,the wear mechanism of the sample is changed from abrasive wear and fatigue wear during dry friction into slight fatigue wear,and the boundary oil lubrication contributes to the lower friction coefficient and wear rate compared with the dry friction.
作者
何福善
周子涵
郑开魁
高诚辉
林有希
江威
HE Fushan;ZHOU Zihan;ZHENG Kaikui;GAO Chenghui;LIN Youxi;JIANG Wei(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou Fujian 350108,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2020年第3期38-43,共6页
Lubrication Engineering
基金
国家自然科学基金项目(51875106).
关键词
油润滑
复合材料
摩擦学性能
稀土化合物
磨损机制
oil lubrication
friction composite
tribological performance
RE compound
wear mechanism
