Evaluation of the friction and wear properties of PTFE composites filled with glass and carbon fiber

2010 ◽  
Vol 41 (2) ◽  
pp. 115-118 ◽  
Author(s):  
J. Li ◽  
Y. Ran
Keyword(s):  
Carbon Fiber ◽  
Friction And Wear ◽  
Wear Properties ◽  
Friction And Wear Properties ◽  
Ptfe Composites

Tribological behavior and morphology of PTFE particulate-reinforced POM matrix composites

2017 ◽  
Vol 37 (3) ◽  
pp. 227-237 ◽  
Author(s):  
Qi Liu ◽  
Wei Luo ◽  
Shengtai Zhou ◽  
Huawei Zou ◽  
Mei Liang
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Friction And Wear ◽  
Thermodynamic Characteristics ◽  
Special Focus ◽  
Wear Properties ◽  
Scanning Calorimetry ◽  
Sliding Speed ◽  
Friction And Wear Properties ◽  
Ptfe Composites

Abstract The friction and wear properties of polyoxymethylene/polytetrafluoroethylene (POM/PTFE) composites were investigated by using a block-on-ring friction tester and special focus was paid to the effect of weight average molar mass (Mw) of POM. To study the thermodynamic characteristics and wear mechanism of composites, differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were used. Results showed that friction and wear properties of the composite blends were strongly affected by the Mw of POM and the loading fractions of PTFE. POM/PTFE composites with lower Mw of POM owned better wear resistance abilities under a high-speed sliding regime, which resulted from the effective lubrication of transferred wear debris under a relatively high sliding speed. However, the transfer layer on the counterface could be easily peeled off under the low sliding speed, resulting in higher wear rate of POM/PTFE composites with lower Mw of POM. POM and its composites with high Mw showed comparative high friction levels, related to the strong adhesion between the resin and the steel counterpart. DSC analysis showed that POM with lower Mw had higher crystallinity, which was beneficial to the improvement of wear resistance in a high-speed sliding condition.

Friction and Wear Properties of PTFE Composites Against 6061-T6 Aluminum Alloy Under Hydrogen Atmosphere

2011 ◽  
Author(s):  
Y. Sakano ◽  
T. Iwai ◽  
Y. Shoukaku
Keyword(s):  
Aluminum Alloy ◽  
Wear Rate ◽  
Friction And Wear ◽  
Wear Track ◽  
Hydrogen Atmosphere ◽  
Specific Wear Rate ◽  
Wear Properties ◽  
Friction And Wear Properties ◽  
Ptfe Composites ◽  
Alloy 6061

The friction and wear properties of polymer were investigated under a hydrogen atmosphere, by using PTFE (polytetrafluoroethylene) and two kinds of PTFE composites. Experiments were also conducted in air, nitrogen, and vacuum environment. The experiment carried out by pin-on-disk friction and wears apparatus in the vacuum chamber. Pin specimens are no filling PTFE, Gr-filled PTFE (Gr filled with 25 wt%) and MoS2–filled PTFE (MoS2 filled with 25 wt%). Friction disk is aluminum alloy 6061-T6 with 0.02μm surface roughness. Aluminum alloy 6061-T6 is able to use for apparatus for hydrogen. After experiments, specific wear rate was calculated, specimen surface, wear track and wear debris were observed, surface profile of the wear track were measured. The specific wear rate of unfilled PTFE and PTFE/MoS2 of in air was lower than the other atmospheres. The A6061-T6 disk was worn by PTFE pin specimens and in the case of wear track was much rougher, the specific wear rate of pin specimens tended to increase without unfilled PTFE in air and PTFE/Gr.

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