2134/20791
Guangyu Bian
Guangyu
Bian
Houzheng Wu
Houzheng
Wu
Friction surface structure of a Cf/C-SiC composite brake disc after bedding testing on a full-scale dynamometer
Loughborough University
2016
Carbon-ceramic brake disc
Friction surface
Transferred materials
Friction layer microstructure
Materials Engineering not elsewhere classified
Mechanical Engineering
2016-04-04 14:17:31
Journal contribution
https://repository.lboro.ac.uk/articles/journal_contribution/Friction_surface_structure_of_a_Cf_C-SiC_composite_brake_disc_after_bedding_testing_on_a_full-scale_dynamometer/9234656
We have examined friction surface structure of a carbon ceramic brake disc tested on a full-scale dynamometer with microscopy techniques. The bedded friction surface is composed of two types of regions: transferred materials (TM) and SiC. The TM regions were formed through the deposition of wear debris into surface voids, followed by compaction and crystallite refinement during braking. A thin friction layer (FL) was developed on top of TM and SiC regions with nano-sized copper/iron oxide crystallites as the primary constituent. Analysis shows that debris generated from pad is the main source of TM and FL. No evidence shows chemical diffusion bonding between TM and composite constituent. On silicon carbide surface, dislocations were activated as the sources of surface fracture.