PROCESSING AND FRICTION PROPERTIES EVALUATION OF MULTILAYER CU MATRIX HYBRID COMPOSITE BRAKE PADS FOR A TRAINER AIRCRAFT

摘要

We have developed three types of multi layer Cu matrix composite brake pads, namely, Copper-silica-BN, Copper-Si3N4-graphite, and Copper-mullite-MoS2 to solve the problem of static torque, friction coefficient in the upgraded version of Trainer aircraft. These composite brake pads were tested in a full scale brake dynamometer and static torque testing unit at ARDC, HAL. Our results shows that the braking requirements of static torque (～ 204 Kgfm), friction coefficient (～0.3-0.45) were very well met in the multilayer Copper-mullite-MoS_2 composite brake pads. The role of M0S2 and Mullite in improving static torque, friction coefficient and stabilizing frictional properties in this composite brake pads were explained in detail.