Break-away friction of PTFE materials in lubricated conditions

Golchin, Arash; Simmons, Gregory F.; Glavatskih, Sergei

doi:10.1016/j.triboint.2011.03.025

Cited by 54 publications

(34 citation statements)

References 16 publications

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“…This clearly indicates better heat dissipation in case of the polymeric coating. Another advantage with a polymer coating is a relatively more uniform and lower maximum operating pressure [10]. This is also evident from the present tests.…”

Section: Discussionsupporting

confidence: 77%

“…The breakaway friction of polymers has been studied [9,10] with a view to reduce the breakaway friction of hydrodynamic journal bearings and to replace the conventional babbitt material. A soft polymer layer can be beneficial not only for starting friction but also for operation in full film regime due to the compliant property of polymers.…”

Section: Introductionmentioning

confidence: 99%

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Static/dynamic friction and wear of some selected polymeric materials for conformal tribo-pairs under boundary lubrication conditions

Nilsson¹,

Prakash

2013

Friction

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This work is aimed at investigating the friction and wear performance of different polymeric materials having potential for hydraulic system components under lubricated sliding conditions against a steel counter face. A pin-on-disc test configuration was used for the experimental study. The different polymeric materials selected for these studies were commercial polyimides (PI), polyether ether ketone (PEEK), and flouropolymers. Some of these materials were bulk materials whereas others were used as coatings applied on to the cast iron substrate. The tribological characteristics of the polymers were compared with a reference grey cast iron. The frictional characteristics were evaluated in both static and dynamic conditions. The results have shown that by using polymeric materials it is possible to reduce breakaway friction by an order of magnitude compared to grey cast iron. However, the breakaway friction increased significantly after the wear tests. The polymeric materials having lowest breakaway friction have shown the highest wear with the exception of the PEEK-PTFE coating which showed low wear. PI with graphite fillers also showed low wear but it resulted in relatively high friction. The carbon fibre reinforced materials resulted in unstable friction as well as higher wear compared to the PI materials with graphite fillers.

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Section: Discussionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Static/dynamic friction and wear of some selected polymeric materials for conformal tribo-pairs under boundary lubrication conditions

Nilsson¹,

Prakash

2013

Friction

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show abstract

“…Such materials are elastic polymers, and as previous studies showed [1][2][3][4][5][6][7][8][9], provide significant advantages over white metal. For example, a polytetrafluoroethylene (PTFE) liner reduces break-away friction during start-ups [1]. Inlet oil film temperature and maximum oil film pressure in a PTFE faced bearing are reduced as shown by the TEHD analysis in [2].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic behaviour of vertical and horizontal rotors in compliant liner tilting pad journal bearings: Some design considerations

Cha

Glavatskih

2015

Tribology International

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“…It was proposed by Arash Golchin et al [2] [7], this work uses high tenacity expanded polytetrafluoroethylene (ePTFE) filaments as both a fiber reinforcement and a reservoir for solid lubricants. The wear rates obtained from the inclusion of expanded PTFE filaments were better than conventional powder filled PTFE-PEEK composites reaching values as low as K=7×10−8mm 3 /Nm and showed stable friction coefficients below = 0.125 for over 2 million cycles.…”

Section: B Objectivementioning

confidence: 99%