Method for manufacturing carbon-carbon composites

Abstract

A method for manufacturing carbon-carbon composites includes steps of producing a mat using carbon fiber, carbon fabric, carbon sheet, or staple fiber; laminating at least three layers of mats; producing a preform using the laminated mats with a needle punching method; performing a first thermal treatment process on the produced preform at a predetermined temperature; densifying the first-thermal-treated preform; performing a second thermal treatment process on the densified preform; forming a predetermined shape out of the second-thermal-treated preform; and performing an oxidation resistant treatment process of the shaped preform. A brake disk manufactured by the above method has high compression and shear strength as well as low friction coefficient for use in civil aircraft requiring a low friction coefficient and high loads. A brake disk produced with a liquid impregnation method can bear thermal and mechanical loads at high temperatures. The processing period can be drastically reduced, and carbon-carbon composites can be formed with excellent high-temperature properties such as frictional coefficient, abrasion, thermal conductivity, thermal expansion coefficient, density, specific heat, compression and shear strength, and oxidation resistance.

Dependencies are inferred from the claim text.