1. Carbon-Ceramic Brakes Josué De Lara Bashulto MEEN 3344 Photo Credit: http:// news.caradisiac.com

2. Carbon Fiber Reinforced Silicon Carbide (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 Image:Z. Stadler/Journal of the European Ceramic Society(2006)

3. Manufacture Preparation of a C/C composite core Preparation of a C/C composite core Liquid silicon infiltration Liquid silicon infiltration Vacuum Vacuum High temperature High temperature SiC layer is formed on the surface of C/C core SiC layer is formed on the surface of C/C core Grinding of the sliding surface of disk Grinding of the sliding surface of disk

4. Benefits 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

5. Applications Image credit: Continental Teves ® Image credit: R. L. Hecht, Materials Science Department, Ford Research Laboratory Super-sport vehicles Luxury SUVs Aircraft Elevators Trains

6. References Choi, Ji-Hoon, Jae-Hung Han, and In Lee. “Transient Analysis of Thermoelastic Contact Behaviors in Composite Multidisk Brakes.” Journal of Thermal Stresses, 27: 1149-1167,2004. Choi, Ji-Hoon, Jae-Hung Han, and In Lee. “Transient Analysis of Thermoelastic Contact Behaviors in Composite Multidisk Brakes.” Journal of Thermal Stresses, 27: 1149-1167,2004. High Performance Automotive Brakes. 28 Sep. 2006. SGL Technologies Website. 2005 High Performance Automotive Brakes. 28 Sep. 2006. SGL Technologies Website. 2005http://www.sglcarbon.com/sgl_t/brakedisc/index.html Stadler, Zmago, Kristoffer Krnel, and Tomaz Kosmac. “Friction behavior of sintered metallic brake pads on a C/C-SiC composite brake disk.” Journal of European Ceramic Society (2006): Stadler, Zmago, Kristoffer Krnel, and Tomaz Kosmac. “Friction behavior of sintered metallic brake pads on a C/C-SiC composite brake disk.” Journal of European Ceramic Society (2006): doi:10.1016/j.jeurceramsoc.2006.04.032