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石墨的取向对聚酰亚胺摩擦性能的影响
引用本文:杨睿,苏正涛,李红波,赵文博.石墨的取向对聚酰亚胺摩擦性能的影响[J].中国塑料,2020,34(5):21-25.
作者姓名:杨睿  苏正涛  李红波  赵文博
作者单位:中国航发北京航空材料研究院,减振降噪材料及应用技术航空科技重点实验室,北京 100095
摘    要:通过热模压成型工艺制备了聚酰亚胺(PI)/石墨(NG)复合材料,对其摩擦性能、断面及磨痕形貌进行了测试与表征。结果表明,NG在PI基体中沿着与成型压力垂直的方向取向;当载荷不变且滑动速度较低时,垂直于摩擦面的NG比平行于摩擦面的NG更能降低PI的摩擦因数;随着滑动速度的提高,这种情况发生转变,而提高载荷后,转变点向低速移动;对比摩擦性能与磨痕形貌的结果发现二者存在紧密的联系,磨痕的表面越光滑、粗糙度越低,摩擦因数与磨损率也越低。

关 键 词:石墨  取向  聚酰亚胺  摩擦性能
收稿时间:2019-11-25

Effect of Graphite Orientation on Tribological Properties of Polyimide
Rui YANG,Zhengtao SU,Hongbo LI,Wenbo ZHAO.Effect of Graphite Orientation on Tribological Properties of Polyimide[J].China Plastics,2020,34(5):21-25.
Authors:Rui YANG  Zhengtao SU  Hongbo LI  Wenbo ZHAO
Affiliation:AECC Beijing Institute of Aeronautical Materials, Aviation Science and Technology Key Laboratory of Vibration Noise Reduction Materials and Application Technology, Beijing Institute of Aeronautical Materials, Beijing 100095, China
Abstract:Polyimide(PI)/natural flake graphite(NG)composites were prepared by a hot-pressing technology,and their tribological properties as well as the morphologies of fracture and worn surfaces were investigated.The results indicated that NG was oriented in the direction perpendicular to the molding pressure in the PI matrix.When the load was constant and the sliding speed was low,the friction coefficient of the composites was reduced more significantly by the NG perpendicular to the friction surface than by that parallel to the friction surface.There was a reverse in this trend with an increase of sliding speed.Moreover,the transition point shifted to a low speed when the load increased.There was a tight relationship between the tribological properties and the morphologies of worn surfaces,and the smoother the worn surface,the lower were the friction coefficient and wear rate.
Keywords:graphite  orientation  polyimide  tribological property  
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