![]() ![]() have studied the frictional and wear properties of pure PEEK and PEEK composites immersed in diesel and motor oil submitted to sliding against steel counterbodies. However, the tribological behavior of PEEK under lubrication, with diesel and motor or transmission oil, has rarely been reported. The second beneficial effect of water is that it removes debris from the frictional region, thereby reducing abrasive wear, and ultimately improving the effect of carbon fiber polishing of the counterbody, in order to reduce surface roughness and wear. On the other hand, the role of water in decreasing frictional heat and reducing contact temperature was considerably pronounced, thus preserving the properties of the polymer such as stiffness, fatigue life and strength of the contact surface. Water inhibits buildup of transfer film it may also penetrate and corrode the fiber-matrix interface. pointed out both the beneficial and harmful effects of water on the friction and wear performance of reinforced polymers. However, it has been established that, in general, the interfacial environment considerably changes the effects of friction in polymers. Most tribological studies related to PEEK friction and wear in the literature were performed exclusively on dry environments. examined the effect of counterpart roughness and temperature in relation to PEEK friction and wear. investigated the behavior of sliding and abrasive wear at room temperature, and Friedrich et al. reported PEEK behavior to abrasive wear Voss et al. Many investigations on the friction and wear properties of PEEK, and its composites, have been performed. PEEK provides advantages such as relatively low friction and low wear rate for many tribological applications. Furthermore, PEEK is known for its excellent tribological properties. It has high melt and glass transition temperatures (Tm = 340 ☌, Tg= 143 ☌), high mechanical properties, excellent chemical resistance and melt and machining processability. Poly(ether-ether-ketone) (PEEK) is a semicrystalline polymer, first mentioned in the literature in the early 1980’s. Keywords: tribology, PEEK, roughness, wear, friction. On average, the friction coefficient on the hydrodynamic regime for polishing was more than 3 times lower than the friction coefficient in the boundary regime for turning. The friction coefficient displayed a direct correlation with the lubrication regime, and the level of counterbody roughness. The conclusion was that the wear rate generated by turning was about seven times as high as the wear rate generated by polishing. The test system used was a tri-pin on disc, with pins made of PEEK and counterbodies made of steel, and then dipped in ATF Dexron VI oil. ![]() Two different finishing processes were selected for this study: turning and polishing. The tribology of natural PEEK, under oil-lubricated conditions, was studied for different metal counterbody finishes. High performance polymeric materials such as poly-ether-ether-ketone (PEEK) are increasingly being used for challenging tribological applications in order to replace metal parts in vehicle engines and transmissions. ![]()
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