Carbon-based barrier coatings for high temperature polymer matrix composites

摘要

A high-temperature polymeric-matrix composite (HTPMC) structure and a method for protecting an HTPMC from exposure to high temperatures in the presence of air, and prevent thermo-oxidative degradation. A thin, lightweight layer of a carbon-based barrier is applied onto a surface of the HTPMC structure. The carbon-based barrier coating is composed of graphene, amorphous carbon, or a mixture comprising a combination of graphene and amorphous carbon, and has coefficient of thermal expansion that is less than 10 times the coefficient of thermal expansion of the HTPMC structure. The carbon-based barrier may be coated with an erosion-barrier.