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Materials Selection of Disc Brake Pads

Learn about the materials used in disc brake pads, including organic, semi-metallic, and ceramic options. Understand the factors influencing material selection, such as coefficient of friction, heat fade, thermal expansion, and hardness, impacting braking performance and longevity.

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Materials Selection of Disc Brake Pads

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  1. Materials Selection of Disc Brake Pads Benjamin Narvaez MEEN 3344

  2. Operation of Disc Brakes • Brake pedal is depressed pushing fluid through the system • A piston is then forced out • Brake pads are forced together • Friction between pads and rotor cause the car to slow down

  3. Factors in Material Selection • Coefficient of friction • Heat fade • Thermal expansion • Hardness

  4. Brake Pad Materials Organic and Asbestos - health issues, softer composition, low heat fade resistance, small range of use Semi-Metallic - 40% metal by content wt(steel wool, iron,) hard surface, high friction Towing, larger vehicles Low heat concern, wears rotors fastest Ceramic Ceramic fibers, <15% metal by wt. Ct. High hardness, more advanced technology High heat operation, less heat fade Long life

  5. Text and Photo References • http://www.boschusa.com/AutoParts/FAQs/BrakePads/ • www.wilwood.com • www.howstuffworks.com • http://www.e-z.net/~ts/ts/Brakfade.htm

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