Friction and wear variations of short carbon fiber (SCF)/PTFE/graphite (10vol.%) filled PEEK: Effects of fiber orientation and nominal contact pressure

Zhang, G.; Rasheva, Z.; Schlarb, Alois K.

doi:10.1016/j.wear.2009.12.001

Cited by 100 publications

(49 citation statements)

References 20 publications

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“…This leads to the conclusion that thinning of carbon fibers takes place under repeated interaction with asperities. Macroscopically, the thinning of carbon fibers was also reported as a result of sliding of carbon fiber-reinforced PEEK composites against steel counterbody [5]. Even in polymer composites reinforced by short carbon fibers, some fibers will lie parallel to the relative sliding direction in tribological contacts.…”

Section: Wear Behavior Of Carbon Fibers Studied By Scratchingmentioning

confidence: 93%

“…Besides the carbon fiber type, the orientation of carbon fibers, no matter continuous carbon fibers (CCF) or short carbon fibers (SCF), has been found to have strong influence on the friction and wear properties of polymeric composites. For example, higher wear resistance of a SCF/PTFE/-graphite (10 vol% for each)-filled PEEK composite was registered under higher pressures (3)(4)(5) when the fibers were oriented perpendicular rather than parallel or normal [5]. Thinning, cracking, and debonding of fibers have been suggested as relevant wear mechanisms in polymeric composites [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Mechanisms of Friction and Wear Reduction by Carbon Fiber Reinforcement of PEEK

2015

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Carbon fibers are widely used as reinforcements in poly-ether-ether-ketone (PEEK). In recent years, these materials have also been used for tribological applications. For further optimization of these tribo-materials, the contribution and action mechanisms of carbon fiber reinforcements to the tribological performance of PEEK composites need to be understood. Toward this goal, we have studied carbon fibers in a PEEK composite by scratching experiments using Berkovich and conical indenters and friction imaging using contact atomic force microscopy. For comparison, scratching was extended into the PEEK matrix surrounding the carbon fibers. It is found that shearing dominates the friction and wear behavior of carbon fibers alone, while both shearing and plowing contribute to the overall friction of PEEK composites. There is no local variation in friction across a carbon fiber surface. The wear reduction by carbon fibers originates from their effective load-bearing capability. For the first time, fatigue of individual carbon fibers is revealed, as well as the dependence of interfacial debonding or delamination on the contact configuration between fibers and scratching asperities.

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Section: Wear Behavior Of Carbon Fibers Studied By Scratchingmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Mechanisms of Friction and Wear Reduction by Carbon Fiber Reinforcement of PEEK

2015

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“…As one may notice from literature [23][24][25], the parameters for block-on-ring tests are in a wide range, especially for block dimensions, speed, load and sliding distance. After consulting many reports on this test, the authors considered that a sliding distance of 5000 m is satisfactory for making the friction coefficient and wear stable.…”

Section: Test Methodologymentioning

confidence: 99%

Adding Aramid Fibers to Improve Tribological Characteristics of two Polymers

Botan¹,

Musteata²,

Ionescu³

et al. 2017

Tribol. Ind.

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“…For turning and grinding finishings, the friction coefficient observed was an average of 0.121 ± 0.007 and 0.109 ± 0.009, respectively; for polishing, it was approximately 0.038 ± 0.005, however for honing it displayed a greater dispersion of the results around 0.088 ± 0.026. Several authors [6,7,11,16,17] have investigated PEEK, as well as its composites, for dry sliding, with friction coefficient variations between 0.3 and 0.5. In the present experiment, the samples submitted to turning and grinding remained within a friction coefficient rate between 0.13 and 0.10, which was defined as boundary regime on Figure 4.…”

Section: Definition Of Test Durationmentioning

confidence: 99%

Effect of surface finishing on friction and wear of Poly-Ether-Ether-Ketone (PEEK) under oil lubrication

2016

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SbstractThe tribological properties of poly-ether-ether-ketone (PEEK) containing 30% of carbon fiber were studied in an oil-lubricated environment and different surface finishing of the metallic counterbody. Four different finishing processes, commonly used in the automotive industry, were chosen for this study: turning, grinding, honing and polishing. The test system used was tri-pin on disc with pins made of PEEK and counterbody made of steel; they were fully immersed in ATF Dexron VI oil. Some test parameters were held constant, such as the apparent pressure of 2 MPa, linear velocity of 2 m/s, oil temperature at 85 °C, and the time -120 minutes. The lubrication regime for the apparent pressure of 1 MPa to 7 MPa range was also studied at different sliding speeds. A direct correlation was found between the wear rate, friction coefficient and the lubrication regime, wherein wear under hydrodynamic lubrication was, on average, approximately 5 times lower, and the friction coefficient 3 times lower than under boundary lubrication.

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Friction and wear variations of short carbon fiber (SCF)/PTFE/graphite (10vol.%) filled PEEK: Effects of fiber orientation and nominal contact pressure

Cited by 100 publications

References 20 publications

Mechanisms of Friction and Wear Reduction by Carbon Fiber Reinforcement of PEEK

Mechanisms of Friction and Wear Reduction by Carbon Fiber Reinforcement of PEEK

Adding Aramid Fibers to Improve Tribological Characteristics of two Polymers

Effect of surface finishing on friction and wear of Poly-Ether-Ether-Ketone (PEEK) under oil lubrication

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