Effect of different grinding surface materials on tribological properties of graphite fluoride⁃modified polyether ether ketone

doi:10.19491/j.issn.1001-9278.2023.12.006

Abstract

Abstract:

Polyether ether ketone （PEEK）/fluorinated graphite composites were prepared through melt blending. Their tribological properties against 304^# steel and 45^# steel were investigated by using a ring⁃on⁃block friction and wear test machine， their worn scar surfaces were analyzed by SEM， and their tribological mechanism were explored. The results indicated that the friction coefficient between the composites and 304^# steel decreased gradually with an increase in the content of fluorinated graphite， whereas the change in friction coefficient with 45^# steel was not significant. When the content of fluorinated graphite is lower than 10 wt%， the composites exhibit a lower friction coefficient against 45^# steel. When the content of fluorinated graphite is higher than 15 wt%， the composites show a lower friction coefficient against 304^# steel. According to different loads， the composites with exhibit poor tribological performance toward two types of friction rings under a load of 300 N. However， composites present a higher friction coefficient but a lower wear rate under a load of 100 N.

Key words: fluorinated graphite, polyetheretherketone, grinding surface, friction load, tribological property

CLC Number:

TQ324

LEI Ming, XIA Gengpei, JIANG Yu, AI Daoyi, YOU Zongying, YU Siya, TU Jianlei, CHENG Haonan, XIANG Wei, HUANG Daiqi. Effect of different grinding surface materials on tribological properties of graphite fluoride⁃modified polyether ether ketone[J]. China Plastics, 2023, 37(12): 35-40.

Figures/Tables 8

Fig.1. Characterization of fluorinated graphite

元素名称	C	O	F
相对元素含量/%	53.96	0.82	45.22

Tab.1. Relative element content of fluorinated graphite

Fig.2. Friction coefficient of composites with different friction rings against the content of fluorinated graphite

Fig.3. Effect of friction rings on average friction coefficient （a） and volume wear rate （b） of composites

Fig.4. Microstructure of wear marks of composites under different friction rings

Fig.5. Friction coefficient of the composites under different friction rings

Fig.6. Average friction coefficient and volume wear rate of PEEK/20 % fluorinated ink composites under different friction rings

Fig.7. Worn scar SEM images of the composites under different load

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