High thermal conductivity disk brakes

An automotive disk brake assembly installed in an automobile having a wheel, comprising:

• (a) a floating caliper supporting an inner and outer brake pad;
• (b) a brake rotor having a disk, and a hat, and wherein said hat is bolted to said wheel, said disk further having an inner disk surface and an outer disk surface;
• (c) a hydraulic cylinder adapted to push said inner brake pads into said inner disk surface, thereby causing said floating caliper to move so as to bring said outer brake pad into contact with said outer disk surface;
• (d) wherein said rotor is made at least in part of a material having a thickness and a coefficient of thermal expansion and a thermal conductivity, such that a complete 100 kilometer per hour, 0.9 gross vehicle weight braking causes said disk to expand in thickness by at least 0.15 mm and to cool to shrink in thickness, relative to its expanded thickness, by at least 0.1 mm within 60 seconds of the cessation of braking, in an ambient temperature of less than 30° C.