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Tribological characterization of silicon carbide and carbon materials

Delbé, Karl and Lafon-Placette, Stéphanie and Denape, Jean and Ferrato, Marc Tribological characterization of silicon carbide and carbon materials. (2015) In: Wear of Material 2015, 12 April 2015 - 16 April 2015 (Toronto, Canada).

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Official URL: http://www.wearofmaterialsconference.com/

Abstract

Silicon carbide in homogeneous contact is commonly used in lubricated conditions. Sometimes in pin-on-disc configuration, it is used in dry friction. In this study, we developed experiments with a ring-on-ring configuration under dry friction in order to fit with new mechanical seal applications. A SiC/SiC pair and a SiC/Carbon-Graphite (CG) pair are used as references. A comparison of tribological behavior is proposed for 3 pairs realized with a SiC ring and a CG ring impregnated with antimony, phenolic resin and PTFE. The choice of the impregnant takes in account their accommodation mechanisms in the contact and their thermal diffusion properties. Tribological tests were run at 3 different temperatures (ambient, 120°C and 300°C), 3 speeds (0.5, 1 and 2 m/s) and different contact pressure (0.5, 0,75 and 1 MPa) with an environmental tribometer. During tests, the thermal gradient is recorded via an IR camera. Results are presented in term of friction coefficients and wear. Characterization of the tribofilm is obtained by using MEB, EDX and Raman spectroscopy. This vibrational spectroscopy is also used to investigate the evolution of mechanical stress at the surface of the 2 rings and for every pairs. We propose a mechanism of creation of the third body and the effect of the environment on it. The material flow in and out of the contact is detailed and the energy balance is discussed.

Item Type:Conference or Workshop Item (Poster)
HAL Id:hal-01977472
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Boostec (FRANCE)
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Deposited On:05 Oct 2015 16:47

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