Study on Thermal Degradation of Wear Properties of GF/PTFE Self-lubricating Fiber Composites

doi:10.3901/JME.2023.03.158

Abstract

Abstract: For high frequency oscillating spherical plain bearing, friction heat has significant effect on friction and wear properties of the self-lubricating fiber composites. The glass reinforced polytetrafluoroethylene (GF/PTFE) self-lubricating fiber composites are developed for high frequency service condition, and a MYB-500 high frequency and high load oscillating tribological tester is used to carry out tribological tests of the composites under different friction temperatures. The self-lubricating performance and wear behavior of material under friction heat are investigated, and the wear debris and friction surface and wear mechanisms under different temperatures are analyzed. Results show that, friction heat has notable influence on self-lubricating performance of the composites. Proper friction temperature is beneficial to improve the self-lubricating performance of the material, and the interaction between friction temperature and friction coefficient has a certain effect on wear behavior of the material. High friction heat acts on the self-lubricating process and mechanism, resulting in degradation of material wear properties. Therefore, wear behavior of the composite is different under different friction temperature. The self-lubricating performance under low friction temperature(60-120 ℃)is the best and the wear rate is the lowest. The degradation of friction and wear performance of the composite occurs until it reaches to 140 ℃. Under high temperature(140-180 ℃), the material initially has good self-lubricating performance and slight wear, whereas it becomes worse in the middle and late stage. Micro analysis shows that, the wear mechanism of the material at low friction temperature is mainly slight adhesion and fatigue wear. At high friction temperature, the wear of the material is mainly characterized by a large number of adhesion and flaking off, and the material surface has obvious local damage with serious wear.

Key words: self-lubricating, friction heat, PTFE, friction coefficient, wear

CLC Number:

TH117

LIUJian, LI Weibo, PANG Xianjuan, SONG Chenfei, DU Sanming, ZHANG Yongzhen. Study on Thermal Degradation of Wear Properties of GF/PTFE Self-lubricating Fiber Composites[J]. Journal of Mechanical Engineering, 2023, 59(3): 158-164.

References

[1] 向定汉,潘青林,姚正军. 聚四氟乙烯自润滑编织复合材料关节轴承的摆动摩擦磨损性能研究[J]. 摩擦学学报,2003,23(1):72-75.
XIANG Dinghan,PAN Qinglin,YAO Zhengjun. Friction and wear behavior of polytetrafluoroethylene fabric composite spherical bearing in swaying[J]. Tribology,2003,23(1):72-75.
[2] 沈雪瑾,曹磊,陈有光,等. 织物衬垫自润滑关节轴承的研究现状与展望[J]. 轴承,2009(3):57-61.
SHEN Xuejin,CAO Lei,CHEN Youguang,et al. Research status and prospect of spherical plain bearings with self-lubricating fabric liner[J]. Bearing,2009(3):57-61.
[3] SHEN Xuejin,LIU Yunfei,CAO Lei,et al. Numerical simulation of sliding wear for self-lubricating spherical plain bearings[J]. Journal of Materials Research and Technology,2012,1(1):8-12.
[4] CUI Wenyan,RAZAK,ZHAO Zhijun,et al. Role of transfer film formation on the tribological properties of polymeric composite materials and spherical plain bearing at low temperatures[J]. Tribology International,2020,152:1-11.
[5] ZUO Zhen,SONG Laizhou,YANG Yulin. Tribologic-al behavior of polyethersulfone-reinforced polytetrafluo- roethylene composite under dry sliding condition[J]. Tribology International,2015,86:17-27.
[6] LI Hulin,YIN Zhongwei,JIANG Dan,et al. Tribological behavior of hybrid PTFE/Kevlar fabric composites with different weave densities[J]. Industrial Lubrication and Tribology,2016,68(2):278-286.
[7] SATAPATHYB K,BIJWEJ. Performance of friction materials based on variation in nature of organic fibres Part I. Fade and recovery behavior[J]. Wear,2004,257(5-6):573-584.
[8] GU Dapeng,DUAN Changsheng,FAN Bingli,et al. Tribological properties of hybrid PTFE/Kevlar fabric composite in vacuum[J]. Tribology International,2016,103:423-431.
[9] LARSEN T,ANDERSENT L,THORNINGB,et al. Comparison of friction and wear for an epoxy resin reinforced by a glass or a carbon/aramid hybrid weave[J]. Wear,2007,262(7-8):1013-1020.
[10] ADERIKHAV N,SHAPOVALOVV A. Mechanical and tribological behavior of PTFE-polyoxadiazole ﬁber composites:Effect of ﬁller treatment[J]. Wear,2011,271(5-6):970-976.
[11] VAILJ R,KRICKB A,MARCHMANK R,et al. Polytetraﬂuoroethylene (PTFE) ﬁber reinforced polyetheretherketone (PEEK) composites[J]. Wear,2011,270(11-12):737-741.
[12] YANG Mingming,ZHU Xiaotao,REN Guina,et al. Influence of air-plasma treatment and hexagonal boron nitride as filler on the high temperature tribological behaviors of hybrid PTFE/Nomex fabric/phenolic composite[J]. European Polymer Journal,2015,67:143-151.
[13] VOSSH F. The wear behavior of short-fiber reinforced thermoplastic's sliding against smooth steel surface[J]. Wear of Materials,ASME,1985,1:740-750.
[14] 周先辉,孙友松,王万顺. CF/PTFE纤维混编织物增强环氧复合材料干摩擦特性[J]. 摩擦学学报,2016,36(5):650-658.
ZHOU Xianhui,SUN Yousong,WANG Wanshun. Dry tribological property of carbon/polytetrafluoroethylene hybrid fabric reinforced epoxy composite[J]. Tribology,2016,36(5):650-658.
[15] ZHENG Fei,WANG Qihua,WANG Tingmei. Effects of aramid fiber and polytetrafluoroethylene on the mechanical and tribological properties of polyimide composites in a vacuum[J]. Journal of Macromolecular Science Part B,2015,54(8):927-937.
[16] TSUKIZOET O. Friction and wear of advanced composite materials[J]. Fibre Science and Technology,1983,18(4):265-286.
[17] GUO Fang,ZHANG Zhaozhu,LIU Weimin,et al. Effect of plasma treatment of Kevlar fabric on the tribological behavior of Kevlar fabric/phenoliccomposites[J]. Tribology International,2009,42 (2):243-249.
[18] MENG H,SUI G X,XIE G Y,et al. Friction and wear behavior of carbon nanotubes reinforced polyamide 6 composites under dry sliding and water lubricated condition[J]. Composites Science and Technology,2009,69(5):606-611.
[19] YU Chuanyong,WAN Hongqi,CHEN Lei,et al. Marvelous abilities for polyhedral oligomeric silsesquioxane to improve tribological properties of polyamide-imide/polytetrafluoroethylene coatings[J]. Journal of MaterialsScience,2018,53:12616-27.
[20] CHANG Li,ZHANG Ga,WANG Hongjian,et al. Comparative study on the wear behaviour of two high-temperature-resistant polymers[J]. Tribology Letters,2017,65:34.