Patent Number: 6,309,703

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

Abstract: This invention is a rapid low-cost technique for manufacturing thick high-performance carbon and ceramic composites in the form of uniformly densified near-net shaped structures. This is accomplished by impregnating composite preforms with low-viscosity wetting monomers which undergo polymerization followed by pyrolysis reactions in the preform ultimately creating ceramic and/or carbon matrices. Since the monomers possess low-molecular-weight they have low viscosities. Thus, if they wet the fiber and partially-densified preform they can easily impregnate even the smallest pores. Once inside the preforms, polymerization of the monomers is then initiated, resulting in a liquid matrix-precursor of the high molecular weight needed to produce a superior matrix (upon pyrolysis) with high efficiency.

Inventors: Wapner; Phillip G. (Palmdale, CA), Hoffman; Wesley P. (Palmdale, CA), Jones; Steven (Lancaster, CA)

Assignee: The United States of America as represented by the Secretary of the Air Force

International Classification: C04B 35/83 (20060101); B05D 003/00 ()

Expiration Date: 10/30/2018