EXTRA LONG LIFE CARBON-CARBON FRICTION MATERIAL

摘要

The present invention pertains to carbon-carbon composites what are reinforced with PAN-based carbon fibers and which have an all pyrocarbon matrix deposited via chemical vapor infiltration and/or chemical vapor deposition. The uniquely low wear life of the C-C composites of this invention is achieved via a high initial heat treatment of the preforms made from PAN-based carbon fibers - providing a high modulus to the fibers, making them less abrasive - followed by CVI/CVD of the pyrocarbon matrix. No final heat treatment is needed to achieve the balance of hardness in the fiber and matrix. The composites of the present invention do not have pitch-based fibers or matrices nor do they have resin-based matrices.