Abstract
The 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.
Highlights
A major challenge for the use of polymeric materials wear
At a certain level of roughness, detached in the mobility industry is the replacement of metallic polymeric debris adhere to the valleys of the roughness, materials used in the power train, especially the engine thereby reducing wear rate[9]
The combination of mechanical and wear resistance when surface roughness is perpendicular to slip, natural PEEK does not change its wear characteristics with the increase of roughness Ra, whereas, when surface roughness is parallel, there is a notable increase in the wear rate of PEEK without is one of the characteristics of PEEK which may allow its additives
Summary
A major challenge for the use of polymeric materials wear. at a certain level of roughness, detached in the mobility industry is the replacement of metallic polymeric debris adhere to the valleys of the roughness, materials used in the power train, especially the engine thereby reducing wear rate[9].and transmission[1,2,3]. A major challenge for the use of polymeric materials wear. At a certain level of roughness, detached in the mobility industry is the replacement of metallic polymeric debris adhere to the valleys of the roughness, materials used in the power train, especially the engine thereby reducing wear rate[9]. Friedrich et al.[10] studied the influence of roughness and friction in the components of those systems render direction and parameters on dry wear. S S impractical the use of most polymers, there are some alternatives that can be studied, among those which poly-ether-ether-ketone (PEEK). For versions combined with fibers, the effects of application in mechanical components such as gears, bearings, counterbody roughness and relative slip direction were found thrust washers, bushings, seals, forks, coupling elements, to be less significant than that of regular PEEK
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