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Title: Friction performance of carbon/silicon carbide ceramic composite brakes in ambient air and water spray environment
Authors: Bian, Guangyu
Wu, Houzheng
Keywords: Carbon ceramic composite brake
Friction coefficient
Hydrodynamic friction
Issue Date: 2015
Publisher: © Elsevier Ltd.
Citation: BIAN, G. and WU, H., 2015. Friction performance of carbon/silicon carbide ceramic composite brakes in ambient air and water spray environment. Tribology International, 92, pp. 1 - 11.
Abstract: We have examined friction performance, friction surface structure and chemistry of a carbon/silicon carbide ceramic brake disc tested against an organic pad in air, and water spray environment. An average friction coefficient of 0.52 and 0.4 for a braking stop is achieved after bedding in air for a composite disc comprising 53.1% and 17.7% SiC/Si, respectively. It is identified that 100% SiC/Si and ~50% C<inf>f</inf>/C regions contribute the friction measurement. Tested in water spray, both brakes show a substantial fall of friction coefficient to a level <0.1. Evidences are provided for the existence of hydrodynamic friction. Friction transfer materials removal, SiC region polishing, and lower real contact pressure reinforce hydrodynamic process that a ceramic composite brake can experience.
Sponsor: Technology Strategy Broad (TSB), UK (TSB/CRD/100696)
Version: Accepted for publication
DOI: 10.1016/j.triboint.2015.05.023
URI: https://dspace.lboro.ac.uk/2134/18281
Publisher Link: http://dx.doi.org/10.1016/j.triboint.2015.05.023
ISSN: 0301-679X
Appears in Collections:Published Articles (Materials)

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