Friction and wear of rare earths modified carbon fibers filled PTFE composite under dry sliding condition

Qian-qian, Shangguan; Cheng, Xinbin

doi:10.1016/j.apsusc.2007.05.015

Cited by 31 publications

(7 citation statements)

References 17 publications

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“…This makes it easy to oxidize during storage and usage, resulting in the presence of oxygen‐containing functional groups such as hydroxyl and carbonyl. After treatment with CeCl 3 ‐ethanol solution, Ce coordinates with CF surface oxygen and nitrogen, introducing more oxygen‐containing functional groups 24,25 . Consequently, RCF exhibits a certain amount of Ce and an increased oxygen content.…”

Section: Resultsmentioning

confidence: 99%

“…This results in three-body abrasive wear, causing fatigue spalling and scratching of the coating. 22,25 As depicted in Figure 7D, there are no extensive detachment pits in the RCF/WS 2 /PAI composite coating. Although some CF are exposed, they remain within the coating (shown by the yellow circles).…”

Section: Analysis Of Mechanism For Enhanced Tribological Performancementioning

confidence: 92%

“…After treatment with CeCl 3 -ethanol solution, Ce coordinates with CF surface oxygen and nitrogen, introducing more oxygencontaining functional groups. 24,25 Consequently, RCF exhibits a certain amount of Ce and an increased oxygen content. On the CNTs-CF surface, the oxygen content decreases while the Ce element increases, which can be attributed to the enlarged surface area of the material after CNTs attachment and the abundant Ce coordination sites on the CNTs surface.…”

Section: Surface Morphology and Chemical Composition Of Cnts-cfmentioning

confidence: 99%

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Tribological performance of WS₂/PAI composite coating reinforced with carbon nanotubes‐carbon fiber at high temperatures

Zhao,

Liu,

et al. 2024

Polymer Composites

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The carbon nanotubes (CNTs) were chemically grafted onto carbon fibers (CFs) to prepare a CNTs‐CF multiscale reinforcement. The tungsten disulfide/polyamide‐imide (WS2/PAI) composite coating, with PAI as the binder and WS2 as the lubricant filler, was prepared. The enhancement mechanism of CNTs‐CF on the high‐temperature tribological performance of WS2/PAI composite coating was analyzed. The addition of CNTs‐CF was found to increase the temperature of the 10% mass loss of PAI by 14.2°C, indicating its ability to improve the thermal stability of the coating. The hardness of the CNTs‐CF‐modified WS2/PAI composite coating was measured to be 17.9% higher than that of the WS2/PAI substrate. The incorporation of CNTs‐CF significantly improved the tribological performance of the WS2/PAI composite coating. Particularly at 200°C, the friction coefficient and wear rate of CNTs‐CF modified WS2/PAI composite coating were only 0.095 and 8.92 × 10−5 mm3/(N·m), respectively, which decreased by about 70.3% and 62.2% compared to the WS2/PAI substrate. Further analysis revealed that CNTs‐CF is firmly embedded within the WS2/PAI composite coating through the synergistic mechanism of mechanical interlocking and molecular adsorption. Furthermore, CNTs‐CF formed a stable lubricating film, ensuring the excellent friction and wear performance of the coating.Highlights The CNTs‐CF can mitigate the thermal degradation of PAI. The high‐temperature wear resistance of the coating was noticeably improved. The problem of CF easily detaching from the coating was resolved. The main components of the transfer film were analyzed.

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Section: Resultsmentioning

confidence: 99%

Section: Analysis Of Mechanism For Enhanced Tribological Performancementioning

confidence: 92%

Section: Surface Morphology and Chemical Composition Of Cnts-cfmentioning

confidence: 99%

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Tribological performance of WS₂/PAI composite coating reinforced with carbon nanotubes‐carbon fiber at high temperatures

Zhao,

Liu,

et al. 2024

Polymer Composites

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“…16 This specified value of mass fraction has also been widely used in other studies due to its excellent tribological performance. 18,19 Friction refers to the resistance to movement generated when two objects come into contact. Therefore, the material properties (e.g., Young's modulus, Poisson ratio, and the roughness) and the surface treatment (e.g., mechanical or chemical treatment) of the counterface also have a large influence on the tribological performance of PTFE-based composites.…”

Section: Introductionmentioning

confidence: 99%

“…16 This specified value of mass fraction has also been widely used in other studies due to its excellent tribological performance. 18,19…”

Section: Introductionmentioning

confidence: 99%

Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiC_x/DLC film

Deng,

Liu,

Pang

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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Polytetrafluoroethylene (PTFE) has been widely used in industrial field for sealing parts. However, it is well known that PTFE is always subject to serious wear at high temperature (over 150 °C), which has become the main drawback limiting serve life of important equipment such as compressors. In this paper, a new solution is proposed for improving the wear resistance of carbon fibers-reinforced PTFE (CFRPTFE). Multilayer Ti-TiCx/DLC film is prepared and used as the counterface of CFRPTFE. Friction and wear tests at high temperature (200 °C and 250 °C) are carried out. The uncoated 17-4PH steel disks precisely polished by abrasive papers with different grain sizes are used as the reference counterface (SS80 and SS7000). It is found that by sliding against Ti-TiCx/DLC film, the tribological behaviors of CFRPTFE at high temperature can be improved. The friction coefficient between CFRPTFE and DLC under different test conditions can be kept in stable state. The wear rates of CFRPTFE reduce by 50%–70% compared to SS80, and reduction of 20%–40% can be observed when compared to SS7000. It can be found that graphitization transition at high temperature promotes the transfer layer formation and contributes to lower friction and lower wear compared to traditional processed counterface at high temperature. These significant improvements can prolong the lifetime of CFRPTFE moving parts used in high-temperature and heavy-load applications. Finally, engineering verification of the proposed friction pair is carried out in miniature oil-free high-pressure compressor.

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Research on the tribological performance of Cr₂O₃ filled with bronze‐based PTFE composites

Zeng

Feng

et al. 2014

J of Applied Polymer Sci

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Enhancement of the wear resistance of bronze-filled polytetrafluoroethylene (PTFE) composites has been achieved using various fillers, for example, chromic oxide (Cr 2 O 3 ), molybdenum disulfide (MoS 2 ), graphite, and nanometer aluminum oxide (nAl 2 O 3 ), in the present study. The wear resistance was evaluated by a block-on-ring wear tester, and the effects of fillers on the wear resistance as well as the mechanism were investigated. The wear rate for the composite where the recipe containing 59% PTFE 1 40% bronze 1 1% Cr 2 O 3 was 0.5 3 10 25 mm 23/N m and for the composite in the recipe containing 60% PTFE 1 40% bronze was 4.2 3 10 25 mm 23 /N m, which meant that that Cr 2 O 3 increased the wear resistance by approximately 10 times. The differential scanning calorimetry measure analysis showed that Cr 2 O 3 had a positive effect on the crystallization of PTFE; the crystallinity of PTFE composites increased from 45% to 52%, which exhibited improved wear resistance. Wear testing and scanning electron microscope analysis had shown that Cr 2 O 3 had a positive effect on the formation of transfer film and keeping it stable to exhibit improved wear resistance. X-ray photoelectron spectroscopy results also showed that Cr 2 O 3 was effective in tribochemical reactions during sliding against stainless ring; these maybe responsible for forming transfer film and lowering wear rate of composite.

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Friction and wear of rare earths modified carbon fibers filled PTFE composite under dry sliding condition

Cited by 31 publications

References 17 publications

Tribological performance of WS₂/PAI composite coating reinforced with carbon nanotubes‐carbon fiber at high temperatures

Tribological performance of WS₂/PAI composite coating reinforced with carbon nanotubes‐carbon fiber at high temperatures

Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiC_x/DLC film

Research on the tribological performance of Cr₂O₃ filled with bronze‐based PTFE composites

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Friction and wear of rare earths modified carbon fibers filled PTFE composite under dry sliding condition

Cited by 31 publications

References 17 publications

Tribological performance of WS2/PAI composite coating reinforced with carbon nanotubes‐carbon fiber at high temperatures

Tribological performance of WS2/PAI composite coating reinforced with carbon nanotubes‐carbon fiber at high temperatures

Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiCx/DLC film

Research on the tribological performance of Cr2O3 filled with bronze‐based PTFE composites

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Product

Resources

About

Tribological performance of WS₂/PAI composite coating reinforced with carbon nanotubes‐carbon fiber at high temperatures

Tribological performance of WS₂/PAI composite coating reinforced with carbon nanotubes‐carbon fiber at high temperatures

Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiC_x/DLC film

Research on the tribological performance of Cr₂O₃ filled with bronze‐based PTFE composites