Dow Corning Corporation

Northrop Grumman Systems Corporation

Gary Lee Stark

Daniel R Petrak

Frank K Chi

Richard E Jones

Robert A Petrisko

Gregg A Zank

Conductive and/or chemically absorptive ceramic fibers are woven with optional non-conductive/non-absorptive ceramic fibers to create a fiber reinforcement which is impregnated with a ceramic-material-producing (pre-ceramic polymer) binder and heated to create the ceramic honeycomb with controlled ohmic loss and/or chemical absorption properties. The desired properties of the honeycomb material can be provided by the conductive and/absorptive ceramic fibers alone or in combination with non-fibrous or fibrous conductive and/or absorptive ceramic material provided by the binder, typically a preceramic polymer which may or may not contain dispersed ceramic materials; after the honeycomb is formed, the non-fibrous or fibrous conductive and/or absorptive ceramic material is interspersed throughout the honeycomb. By heating the impregnated fiber reinforcement in the absence of oxygen, carbon from any carbon-containing materials within the binder remain as a part of the honeycomb material. The honeycomb can be loaded with additional carbon or carbon-containing fibers by repeating the loading and heating in the absence of oxygen steps. For applications requiring long-term thermo-oxidative resistance, refractory ceramics like pure silicon carbide can be substituted for the fibers or fillers employed.

High temperature electromagnetic radiation absorbent material and method

Ceramic honeycomb and method

Fiber reinforced ceramic matrix composites are prepared by coating refractory fibers having a interfacial coating thereon with a curable preceramic polymer having a char which contains greater than about 50% sealant oxide atoms followed by forming the coated fibers into the desired shape, curing the coated fibers to form a pre-preg, heating the pre-preg to form a composite and heating the composite in an oxidizing environment to form an in situ sealant oxide coating on the composite. The resultant composites have good oxidation resistance at high temperature as well as good strength and toughness.

Method for making ceramic matrix composites

What is disclosed is a method of preparing fiber reinforced glass composites from high modulus fibers and resin sols of organosilsesquioxanes, metal oxides, and metal alkoxides. The composites are obtained by firing a partially cured, pressed, and post-cured prepreg to an elevated temperature in an inert atmosphere. A simple, low temperature laminating procedure is used in the preparation of these composites in place of the standard hot pressing technique.

Fiber reinforced glass matrix composites

What is disclosed is a method of preparing fiber reinforced glass composites from high modulus fibers and organopolysiloxane resins. The composites are obtained by firing a partially cured, pressed, and post-cured prepreg to an elevated temperature in an inert atmosphere. A simple, low temperature laminating procedure is used in the composite preparation in place of the standard hot pressing technique.

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Midland, MI, United States of America

Gary Lee Stark