Carbon matrix composites fabricated by a rapid and low-cost process incorporating in-situ polymerization of wetting monomers

摘要

A high-temperature fiber-reinforced carbon-carbon composite material of essentially uniform density, is fabricated by the following sequence of steps:;(a) selecting a fiber/matrix material combination;;(b) providing a fiber preform of desired shape and fiber placement;;(c) selecting at least one low-viscosity pre-carbon monomer material that wets the surfaces of the fiber preform;;(d) impregnating the fiber preform with the monomer;;(e) polymerizing the monomer material in-situ in a single phase process into a pre-carbon polymer of desired molecular weight;;(f) pryolyzing the pre-carbon polymer to form a carbon matrix material; and;(g) repeating steps (d)-(f) to further densify the preform.