Research Papers: Friction & Wear

Friction and Wear Mechanisms of Phenolic-Based Materials on High Speed Tribometer

[+] Author and Article Information
Damien Meresse

Research Engineer
e-mail: damien.meresse@univ-valenciennes.fr

Michel Watremez, Monica Siroux

Assistant Professor

Laurent Dubar


Souad Harmand

TEMPO Laboratory, University of Valenciennes,
Valenciennes, 59313, France

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received March 29, 2012; final manuscript received August 29, 2012; published online April 29, 2013. Assoc. Editor: Dae-Eun Kim.

J. Tribol 135(3), 031601 (Apr 29, 2013) (8 pages) Paper No: TRIB-12-1042; doi: 10.1115/1.4023803 History: Received March 29, 2012; Revised August 29, 2012

This work takes place in the understanding of the friction and wear mechanisms occurring in reinforced phenolic materials, widely used in organic braking pads. As the matrix is filled with a large variety of particles, the phenomena in the contact zone are complex and multiphysic. In a first approach the reinforcement is restricted to spherical steel particles with diameters in the range of the fibbers size. The influence of the sliding speed, the mean normal pressure and the contact temperature are examined and the benefits of using this kind of particle is as well discussed. The tribological tests are performed on a newly developed High Speed Tribometer designed to reproduce braking conditions. The results show that temperature is the most influential parameter, leading to a decrease of the friction coefficient. They further indicate that reinforcement pushes the loss of efficiency to a higher temperature. Optical observations and profilometer analysis show that the wear mechanisms are clearly dependent on friction conditions. These results improve our knowledge of wear debris formation and conditions leading to particle debonding in phenolic matrix material.

Copyright © 2013 by ASME
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Fig. 1

High Speed Tribometer: pin on disc configuration

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Fig. 2

Typical friction test results

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Fig. 3

Disc surface profile after machining procedure

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Fig. 4

Sliding speed influence on friction coefficient

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Fig. 5

Mean normal pressure influence on friction coefficient

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Fig. 6

Temperature influence on friction coefficient

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Fig. 7

Resin elastic modulus as a function of temperature

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Fig. 8

Pure phenolic pin surfaces obtained using profilometer analysis

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Fig. 9

Reinforced pin surfaces obtained using profilometer analysis

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Fig. 10

SEM observations of steel particles




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