The Tribological Properties of PEEK Machine Elements

Shukur, Zainab (2021). The Tribological Properties of PEEK Machine Elements. University of Birmingham. Ph.D.

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This research reports on the relative dynamic performances of laser-sintered and injection-moulded poly-ether-ether-ketone (EOS PEEK HP3) gears and discusses the possibility of producing high performance polymer gears, manufactured by laser-sintering.
Recent developments in laser-sintering of EOS PEEK HP3 have substantially improved its mechanical properties, and these are now comparable with injection-moulded PEEK.
Here the wear rates and failure mechanisms, including contact fatigue and surface melting of laser-sintered and injection-moulded EOS PEEK HP3 were tested under conditions of relatively high loads and high slip-ratios through Twin Disc test rig and TE77 EP-GEAR DYNAMICS test rig high frequency reciprocating tribometer to simulate polymer gears contact unlubricated and lubricated in addition to gears direct testing.
It was observed that the coefficient of friction and wear rates were significantly below that of injection moulded PEEK. However, when using of laser sintered EOS PEEK HP3 for gears for transmission of power, the predominant failure mechanism was bending fatigue, and this meant using this material limited power transmission to low levels.
The use of a laser-sintered EOS PEEK HP3 in gears power transmission effects by the improving the tribological performance of gear teeth with surface lubricated conditions.
Despite the advances made in laser-sintering of EOS PEEK HP3 further advances are required before it can be used for gears in power transmission.

Type of Work: Thesis (Doctorates > Ph.D.)
Award Type: Doctorates > Ph.D.
Licence: All rights reserved
College/Faculty: Colleges (2008 onwards) > College of Engineering & Physical Sciences
School or Department: School of Engineering, Department of Mechanical Engineering
Funders: Other
Other Funders: Ministry of Higher Education and Scientific Research Iraq
Subjects: Q Science > QP Physiology
T Technology > TJ Mechanical engineering and machinery


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