Performance of MMC Rotors in Dynamometer Testing

Automotive brake rotors produced from metal matrix composites (MMCs) were subjected to dynamometer tests. The thermal response during fade stops, the failure temperature, and the wear performance of the rotors were studied as functions of various material and design parameters, such as rotor thickness, composition of the rotors, inertial load, and cooling air speed. The performance of the MMC rotors was also compared with that of commercially available production cast iron rotors. The data related to the maximum operating temperature (MOT) as a function of the silicon carbide level in a composite rotor is also presented. The testing indicates that metal matrix composite materials may be strong candidates for brake rotors in future models of motor vehicles.