Investigation of the Coatings Applied onto Brake Discs on Disc-brake Pad Pair

In severe conditions, braking may cause the temperature on the disc-pad interface to rise up to 800 °C 1 . At such a temperature, the properties of organic compounds are disrupted, coefficient of friction (CoF) decreases, and the rate of wear increases exponentially. This phenomenon is called “fade” 2 . Ideal brake pads, without causing any fades, are expected to function in uniform and stable friction movement 3 . Thermal spray coatings, used to enhance thermal productivity of the systems, to increase the working temperature, and to improve corrosion, oxidization or wear behavior 4-5 , provide a good engineering approach for surface compound characteristics 6-7 . Sanford and Jain 8 and Blau et al. 9 have extensively studied the coating powders that can be commercially used in the coating of brake discs. This study aims to identify the commercially viable hard coatings for discs and to determine their friction coefficient, wear, BTV and DTV characteristics. Two different coatings and coating methods have been selected for this purpose. EXPERIMENTAL PROCEDURE