石墨增强聚酰亚胺在海水中的摩擦学性能

发布时间：2017-12-28 04:32

本文关键词：石墨增强聚酰亚胺在海水中的摩擦学性能　出处：《表面技术》2017年06期 　论文类型：期刊论文

【摘要】：目的为石墨增强聚酰亚胺复合材料在海水环境下的摩擦学应用提供实验依据。方法利用SST-ST销/盘摩擦试验机,研究了质量分数为15%石墨增强聚酰亚胺复合材料与17-4PH不锈钢组成的摩擦副在海水介质中的摩擦学性能,并与干摩擦和纯水润滑条件下的摩擦学性能进行比较。结果聚酰亚胺复合材料在干摩擦下的摩擦系数和磨损体积最大,分别为0.134、1.930 mm~3。干摩擦条件下,聚酰亚胺复合材料的磨损表面存在较深的犁沟,在犁沟周围出现了材料塑性流动及粘着剥落现象,对偶件表面有聚酰亚胺复合材料转移。磨损机理主要表现为磨粒磨损、材料塑性变形以及粘着和剥落。在纯水润滑下,聚酰亚胺复合材料表面存在较多材料粘着撕裂现象,同时存在宽浅不一的犁沟,磨损机理主要为粘着磨损和磨粒磨损。在海水润滑下,复合材料的摩擦系数和磨损体积最小,分别为0.086、1.235 mm~3,材料磨损表面十分光滑,只有沿运动方向存在少量轻微犁沟,磨损机理主要表现为磨粒磨损。结论石墨增强聚酰亚胺复合材料在海水中的摩擦学性能优于干摩擦和纯水环境下的摩擦学性能。
[Abstract]:Objective to provide experimental basis for the tribological application of graphite reinforced polyimide composites in seawater environment. Methods the tribological properties of the friction pair consisting of 15% graphite reinforced polyimide composites and 17-4PH stainless steel in seawater were studied by SST-ST pin / disc friction tester, and compared with the tribological properties of dry friction and pure water lubrication conditions. Results the friction coefficient and wear volume of Polyimide Composites under dry friction are the highest, 0.134 and 1.930 mm~3, respectively. Under dry friction condition, there is a deep ploughing wear surface of polyimide composites, in the furrow around the material plastic flow and adhesion phenomenon, a dual surface transfer polyimide composites. The main wear mechanism is abrasive wear, material plastic deformation, and adhesion and peeling. In water lubrication, there are more material adhesion tearing phenomenon of polyimide composite surface, a wide and shallow furrow, the main wear mechanism is adhesive wear and abrasive wear. In the seawater lubrication, the friction coefficient and wear volume is the smallest, respectively 0.086 and 1.235 mm~3, the wear surface is very smooth, only along the direction of motion there is a small amount of slight furrow, the main wear mechanism is abrasive. Conclusion the tribological properties of graphite reinforced polyimide composites in seawater are better than those of dry friction and pure water.
【作者单位】：武汉材料保护研究所;特种表面保护材料及应用技术国家重点实验室;
【基金】：国家自然科学基金(51505341)~~
【分类号】：TB332;TH117.1
【正文快照】： Received:2017-04-05;Revised:2017-05-23was mainly abrasive wear,plastic deformation,adhesion and peeling under dry friction condition.Provided with pure water lu-brication,the surface was subject to common material adhesion and tearing,shallow and wide fu

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