Patent ID: 6815006
Filing Date: 2004-11-09
Classification: C08F

Abstract:
A method for making a ceramic matrix composite comprising:forming an infiltrated fiber reinforcement by infiltrating a plurality of plies of a fibrous material with a precursor polymer selected from the group consisting of polymerized organo-transition metal complexes selected from the group consisting of transition metal coordinated olefinic groups, selected from the group consisting of ally groups, vinyl groups, and olefinic groups comprising from about 2 to about 8 carbon atoms, molecules selected from the group consisting of boranes, carboranes, and combinations thereof bonded together via an organometallic moiety comprising a transition metal and a ligand, said molecules being selected from the group consisting of ortho-deca-carboranes, meta-deca-carboranes, closo-boranes, nido-boranes, arachno-boranes, hyphoboranes, conjuncto-boranes, and combinations thereof, and organometallic hydrides comprising a transition metal immobilized on a plurality of unsaturated bonds in a backbone polymer; and exposing said infiltrated fiber reinforcement to conditions effective to cure said precursor polymer and to decompose said precursor polymer to a product selected from the group consisting of a refractory metal boride and a refractory metal carbide, said product comprising about 3 wt. % impurities or less.