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Coating is very important in some applications particularly disc brakes that are most commonly used in the passenger cars. Slotted friction material also has a great effect on the behaviour of the disc brake friction. Mixing between the coated rotor and the slotted material is of importance to improve the frictional behaviour of the disc brake. Slotted material used in this work is divided into two parts; each part has leading and trailing edge to give the advantages of using two pads in a single braking action. Simulating the kinetic energy of a passenger car to measure the friction force between the disc and pad at different operating conditions have been designed in a test rig. The effect of thermal loading at the sliding interface between the different friction material and the rotor of Floating Calliper Disc Brake (FCDB) has been studied in this work.

Simulating the kinetic energy of a passenger car to measure friction force between the rotor (disc) and friction material (pad) at different operating conditions have designed a test rig. The effect of thermal loading at the sliding interface between the frictional material and the rotor of Floating Caliper Disc Brake (FCDB) has been studied. The effect of bulk temperature on friction coefficient has been also studied at different loads and speeds. An infrared camera has been fixed at a suitable place to measure the disc surface temperature. The experimental data obtained were digitized and averaged to eliminate the noise in the measured signal using high appropriate technique, then displayed on Digital Storage Oscilloscope and fed to the computer for further analysis. The results showed that, the minimum coefficient of friction was 0.23 at disc surface temperature 250 °C and the maximum reached 0.55 at disc surface temperature of 150 °C.