基于正交设计的纳米蛇纹石-纳米氧化镧/聚四氟乙烯复合材料在沙尘环境下的摩擦学性能  

Tribological properties of nano Serpentine-nano La2O3/polytetrafluoroethylene composites based on orthogonal design in sand-dust environment

作　　者：闫艳红[1] 王腾彬 吴子健 卢欢 贾志宁[2] YAN Yanhong;WANG Tengbin;WU Zijian;LU Huan;JIA Zhining(School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;Hebei Instrument&Meter Engineering Technology Research Center,Chengde Petroleum College,Chengde 067000,China)

机构地区：[1]燕山大学机械工程学院,秦皇岛066004 [2]承德石油高等专科学校,河北省仪器仪表工程技术研究中心,承德067000

出　　处：《复合材料学报》2020年第7期1522-1530,共9页Acta Materiae Compositae Sinica

基　　金：河北省自然基金(E2016411005)。

摘　　要：以聚四氟乙烯(PTFE)为基体,采用正交实验法研究了纳米蛇纹石(nano Serpentine)、纳米氧化镧(nano La2O3)和环境三种因素对nano Serpentine-nano La2O3/PTFE复合材料摩擦学性能的影响。采用自制沙尘模拟装置改进现有的MMU-5G摩擦磨损试验机对nano Serpentine-nano La2O3/PTFE复合材料进行摩擦学实验。通过SEM观察试样磨损表面和转移膜形貌,分析nano Serpentine-nano La2O3/PTFE复合材料磨损机制。结果表明:环境因素对nano Serpentine-nano La2O3/PTFE复合材料的摩擦系数影响最大,干摩擦摩擦系数比沙尘环境下摩擦系数低;nano Serpentine含量对nano Serpentine-nano La2O3/PTFE复合材料的磨损率影响最大,当nano Serpentine质量分数为9wt%时,nano Serpentine-nano La2O3/PTFE复合材料的总体磨损率最低。nano Serpentine-nano La2O3/PTFE复合材料的干摩擦的磨损机制主要为黏着磨损,沙尘环境的磨损机制主要为磨粒磨损。The effects of nano Serpentine,nano La2O3 and environmental factors on the tribological properties of nano Serpentine-nano La2O3/polytetrafluoroethylene(PTFE)composites were investigated by orthogonal test.The self-made sand-dust environment simulation device was used to improve the existing MMU-5G friction and wear tester,and the tribological experiment was carried out using the test machine.The wear surface and transfer film morphology of the nano Serpentine-nano La2O3/PTFE composites were observed by SEM and the wear mechanism was analyzed.The results show that the friction coefficient of nano Serpentine-nano La2O3/PTFE composites is greatly influenced by the environmental factors and the friction coefficient of dry friction is lower than that in sand-dust environment.The nano Serpentine content has the greatest influence on the wear rate of nano Serpentine-nano La2O3/PTFE composites.When the nano Serpentine mass fraction is 9 wt%,the wear rate of nano Serpentine-nano La2O3/PTFE composites is the lowest.The wear mechanism of dry friction is mainly adhesive wear,and the wear mechanism in sand-dust environment is mainly abrasive wear.

关 键 词：聚四氟乙烯(PTFE) 复合材料 正交实验 沙尘环境 摩擦学性能 

分 类 号：TB430.1060[一般工业技术]