Friction and wear of PEEK composites in vacuum environment

Theiler, Géraldine; Gradt, Thomas

doi:10.1016/j.wear.2010.04.007

Cited by 77 publications

(38 citation statements)

References 11 publications

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“…Greco et al [15] focused on the effect of the reinforcement morphology on the high-speed sliding friction and wear of PEEK polymers. Meanwhile, Theiler et al [16] investigated the sliding performance of the PEEK composites in a vacuum environment. PI shows excellent tribological properties, especially under conditions of high pressure, high temperature, high speed, and other extreme environments [11][12].…”

Section: Introductionmentioning

confidence: 99%

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

et al. 2017

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Polyether-ether-ketone (PEEK) and polyimide (PI) are two kinds of engineering polymer materials widely used as roller bearing cages and rings under extreme environment because of their noise reduction and corrosion resistance properties. The Si 3 N 4 ceramic is the most common ball bearing material. Many current engineering applications of ball bearings require aqueous lubrication. Therefore, this study presents the aqueous lubrication of tribopairs formed by PEEK and PI material sliding against Si 3 N 4 ceramic. Experimental results show that two tribopairs exhibited the similar tribological properties under the dry condition. Water as a lubricant for the PI-Si 3 N 4 tribopair pairs effectively reduces both friction coefficients by 35.5% and wear rates by 32%. The water absorption of PI induces better tribological properties by changing the tribopair surface properties. In addition, the dimples appearing on the PI tribopair surface under water generate additional hydrodynamic lubrication and further improve the friction properties of surface. The PEEK-Si 3 N 4 tribopair shows similar friction coefficients under two kinds of environments. The wear rates under water are approximately more than two times of that under dry sliding. However, water inhibits the appearance of the crush phenomenon and enhances the carrying capacity of the tribopair. Energy dispersive spectroscopy and X-ray diffraction spectra demonstrate no chemical corrosion. The 3D profiler and SEM morphologies illustrate that the transfer film would be formed from the surface of PEEK under water but hindered under dry friction. Overall, the PI-Si 3 N 4 tribopair exhibits better properties than PEEK under water and is promising for future applications in the bearing industry.

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Section: Introductionmentioning

confidence: 99%

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

et al. 2017

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“…[1][2][3][4][5] When the polymer matrix must withstand high mechanical and tribological load, it is usually reinforced with various fillers, such as clay, [6] carbon nanotubes (CNTs), [7] mesoporous silica, [8] grapheme, [9] fibers, [10] or inorganic nanoparticles. [11,12] Among these reinforcing elements, fiberbased fabrics are very unique and outstanding because of their high structure ordering and tightness.…”

Section: Introductionmentioning

confidence: 99%

The friction and wear properties of carbon nanotubes/graphite/carbon fabric reinforced phenolic polymer composites

Zhang

Pei

Wang

et al. 2014

Advanced Composite Materials

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In this paper, either graphite (Gr) or carbon nanotubes (CNTs), or both of them were incorporated into carbon fabric reinforced phenolic (CFRP) composites, preparing by a dip-coating and heat molding process, the tribological properties of the resulting composites were investigated using a block-on-ring arrangement. The worn surfaces were observed by scanning electron microscope to understand the mechanism. Experimental results showed that the optimal Gr was more beneficial than CNTs in improving the tribological properties of the CFRP composites when they were singly incorporated. It is well worth noting that the friction and wear behavior of the CNTs-filled CFRP composites were improved further when Gr was added, indicating that there is a synergistic effect between them. Tribological tests under different sliding conditions revealed that the Gr and CNTs-filled CFRP composites seemed to be the most suitable for tribological applications under higher sliding speed and load, and oil lubrication.

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“…It has a layer structure in which the atoms are arranged in a hexagonal unit cell within each layer ; these layers are linked by weak Van der Waals bonds, which can be easily broken by shear force under sliding conditions. Graphite filled polymeric materials have been discussed in the tribological studies in many articles published recently . Wear, however, is a complicated property that has been reported to be influenced by the size and amount of the fillers, the sliding conditions such as counterface materials , environment , lubricated conditions , wear modes , and operating parameters .…”

Section: Introductionmentioning

confidence: 99%

“…Otherwise, our previous study indicated that the combination of PTFE and graphite showed synergistic effect on modifying the tribological capabilities of PA6 . And Theiler et al reported that the negative influence of graphite in vacuum could be compensated by the beneficial effect of PTFE. Yet, Xian et al reported that the addition of PTFE reduced the friction coefficient and wear rate of graphite and short carbon fiber filled epoxy nanocomposites but vice versa for graphite and aramid particle filled nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Effect of solid lubricants on tribological behavior of glass fiber reinforced polyamide 6

Deng

et al. 2013

Polymer Composites

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The tribological properties of glass fiber reinforced polyamide 6 (GF/PA6, 15/85 by weight) and its composites filled with solid lubricants were investigated. The main purposes of this article were to study the hybrid effect of solid lubricants with glass fiber as well as the synergism of combined solid lubricants, the wear mechanisms were studied by SEM. The results showed that graphite impaired the tribological properties of GF/PA6, but the tribology behavior of graphite filled GF/PA6 composite could be significantly improved by polytetrafluroethylene (PTFE) or/and ultrahigh molecular weight polyethylene (UHMWPE), and the GF/PA6 composite filled with 5 wt % graphite, 5 wt % PTFE together with 5 wt % UHMWPE exhibited the lowest friction coefficient and wear rate, which was almost a reduction in friction coefficient by 37% and in wear rate by 34% contrast to GF/PA6. The effect of load was also studied, and the results showed that the friction coefficient was virtually not affected by load, while the wear rate all increased with increasing load. POLYM. COMPOS., 34:1783–1793, 2013. © 2013 Society of Plastics Engineers

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Friction and wear of PEEK composites in vacuum environment

Cited by 77 publications

References 11 publications

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

The friction and wear properties of carbon nanotubes/graphite/carbon fabric reinforced phenolic polymer composites

Effect of solid lubricants on tribological behavior of glass fiber reinforced polyamide 6

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