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Reaction-forming method for producing near net-shape refractory metal carbides

United States Patent

July 20, 2004
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A method for reaction forming refractory metal carbides. The method involves the fabrication of a glassy carbon preform by casting an organic, resin-based liquid mixture into a mold and subsequently heat treating it in two steps, which cures and pyrolizes the resin resulting in a porous carbon preform. By varying the amounts of the constituents in the organic, resin-based liquid mixture, control over the density of the carbon preform is obtained. Control of the density and microstructure of the carbon preform allows for determination of the microstructure and properties of the refractory metal carbide material produced. The glassy carbon preform is placed on a bed of refractory metal or refractory metal--silicon alloy. The pieces are heated above the melting point of the metal or alloy. The molten metal wicks inside the porous carbon preform and reacts, forming the refractory metal carbide or refractory metal carbide plus a minor secondary phase.
Palmisiano; Marc N. (Pittsburgh, PA), Jakubenas; Kevin J. (Austin, TX), Baranwal; Rita (Glenshaw, PA)
The United States of America as represented by the United States Department of Energy (Washington, DC)
09/ 994,823
November 28, 2001
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT The invention described herein was made in the performance of work under a contract awarded by the U.S. Department of Energy. The government has certain rights in the invention.