Tribological behavior of carbon-nanotube-filled PTFE composites

被引：240

作者：

Chen, WX ^{[1
]}

Li, F

Han, G

Xia, JB

Wang, LY

Tu, JP

Xu, ZD

机构：

[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China

[2] Shanghai Jiao Tong Univ, State Key Lab Composite Mat Met Matrix, Shanghai 200030, Peoples R China

[3] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

来源：

TRIBOLOGY LETTERS | 2003年 / 15卷 / 03期

基金：

中国国家自然科学基金;

关键词：

carbon nanotubes; PTFE; composite; friction and wear;

D O I：

10.1023/A:1024869305259

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Carbon nanotube/polytetrafluoroethylene (CNT/PTFE) composites with different volume fractions were prepared and their friction and wear properties were investigated using a ring-on-block under dry conditions. It was found that CNTs significantly increased the wear resistance of PTFE composites and decreased their coefficient of friction. PTFE composites with 15-20 vol.% CNTs exhibited very high wear resistance. The significant improvements in the tribological properties of CNT/PTFE composites are attributed to the super-strong mechanical properties and the very high aspect ratio of CNTs. The CNTs greatly reinforce the structure of the PTFE-based composites and thereby greatly reduce the adhesive and plough wear of CNT/PTFE composites. The CNTs are released from the composite during sliding and transferred to the interface of the friction couples. They thus serve as spacers, preventing direct contact between the mating surfaces and thereby reducing both wear rate and friction coefficient.

引用

页码：275 / 278

页数：4

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