METHOD FOR PRODUCING CARBON-CARBON BRAKE MATERIAL WITH IMPROVED INITIAL FRICTION COEFFICIENT OR BITE

摘要

Method of manufacturing a brake pad that has improved initial friction coefficient or "bite". The method involves molding a carbon-carbon preform into the desired shape; carbonizing the preform by gradually heating it to 650-900°C and holding it at that temperature for approximately one hour, heating the carbonized preform at 1950-2050°C for approximately 4 hours, infiltrating the preform with colloidal silica to fill pores in the preform matrix with silicon carbide, heating the silica­-containing preform at about 1800°C for approximately 4 hours to convert the silica to silicon carbide, subjecting the preform to Carbon Vapor Deposition (CVD) for from 500-1000 hours, and heating the preform at 1600-2800°C for approximately 4 hours to produce the brake pad material.