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Carbon-Ceramic Brakes. Josu é De Lara Bashulto MEEN 3344. Photo Credit: http:// news.caradisiac.com. Carbon Fiber Reinforced Silicon Carbide (C/SiC). C/C Brakes were introduced in aircraft Suffered serious dissadvantages  Low coefficient of friction below 450 C

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Carbon-Ceramic Brakes

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Carbon ceramic brakes l.jpg

Carbon-Ceramic Brakes

Josué De Lara Bashulto

MEEN 3344

Photo Credit: http://news.caradisiac.com


Carbon fiber reinforced silicon carbide c sic l.jpg

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)


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Manufacture

  • Preparation of a C/C composite core

  • Liquid silicon infiltration

    • Vacuum

    • High temperature

  • SiC layer is formed on the surface of C/C core

  • Grinding of the sliding surface of disk


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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


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Applications

  • Super-sport vehicles

  • Luxury SUVs

  • Aircraft

  • Elevators

  • Trains

Image credit: R. L. Hecht, Materials Science Department, Ford Research Laboratory

Image credit: Continental Teves®


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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.

  • High Performance Automotive Brakes. 28 Sep. 2006. SGL Technologies Website. 2005

    http://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): doi:10.1016/j.jeurceramsoc.2006.04.032


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