Carbon-Ceramic BrakesCarbon-Ceramic Brakes

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Carbon Fiber Reinforced Silicon Carbon Fiber Reinforced Silicon Carbide Carbide (C/SiC)(C/SiC)

•C/C Brakes were introduced in aircraft

•Suffered serious dissadvantages

•Low coefficient of friction below 450 C

•High rate of wear for the pads

•C/C-SiC

•Woven carbon reinforced carbon core material

•Thin surface layer of SiC

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ManufactureManufacture

Preparation of a C/C composite corePreparation of a C/C composite core Liquid silicon infiltrationLiquid silicon infiltration

VacuumVacuum High temperatureHigh temperature

SiC layer is formed on the surface of C/C SiC layer is formed on the surface of C/C corecore

Grinding of the sliding surface of diskGrinding of the sliding surface of disk

BenefitsBenefits•High and consistent frictional coefficients (even with high thermal stress)

•High efficiency on a functional temperature range

•Weight advantage over conventional cast iron components (65%)

•Reduction of unsprung mass (5 Kg/wheel) exceptional driving behavior

•Not affected by corrosion

•Superior response in all driving conditions

•Long life span ( in excess of 300,000 Km)

•No disk distortion or judder

•Early and consistent brake response

•Reduction of the stopping distance

ApplicationsApplications

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•Super-sport vehicles

•Luxury SUVs

•Aircraft

•Elevators

•Trains

ReferencesReferences

Choi, Ji-Hoon, Jae-Hung Han, and In Lee. Choi, Ji-Hoon, Jae-Hung Han, and In Lee. “Transient Analysis of Thermoelastic Contact “Transient Analysis of Thermoelastic Contact Behaviors in Composite Multidisk Brakes.” Journal Behaviors in Composite Multidisk Brakes.” Journal of Thermal Stresses, 27: 1149-1167,2004.of Thermal Stresses, 27: 1149-1167,2004.

High Performance Automotive Brakes. 28 Sep. High Performance Automotive Brakes. 28 Sep. 2006. SGL Technologies Website. 20052006. SGL Technologies Website. 2005http://www.sglcarbon.com/sgl_t/brakedisc/http://www.sglcarbon.com/sgl_t/brakedisc/index.htmlindex.html

Stadler, Zmago, Kristoffer Krnel, and Tomaz Stadler, Zmago, Kristoffer Krnel, and Tomaz Kosmac. “Friction behavior of sintered metallic Kosmac. “Friction behavior of sintered metallic brake pads on a C/C-SiC composite brake disk.” brake pads on a C/C-SiC composite brake disk.” Journal of European Ceramic Society (2006): Journal of European Ceramic Society (2006): doi:10.1016/j.jeurceramsoc.2006.04.032