Development of cost-effective,high-performance ceramic-metallic brake pads for agricultural tractors

Abstract

A cerametallic friction pad (CMDE) was developed through the Powder metallurgy route and validated through a classical SAEJ 661 standard laboratory test (Chase Testing machine) followed by the field test. The same was compared with an imported OE (CMOE) pad. In the chase test, CMDE fared poorly in fade-1 by 25% concerning the reference value but fulfilled the fade-II and recovery characteristics. From a wear viewpoint, the specific wear rate of CMDE and CMOE are marginally close. Considering the wear in the field test, CMDE has shown 11.1% more wear than CMOE, but 20% less wear in the mating part. More reduction in the surface roughness of CMDE after the field test evidenced its engagement characteristics by deforming asperities. Adhesive wear scoring marks were visible along the sliding direction of the pressure plate and the sintered friction pad. Thus, CMDE has the potential to replace CMOE in performance and cost