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COLD SPRAY CHROMIUM COATING FOR NUCLEAR FUEL RODS

United States Patent Application

20180025793
A1
View the Complete Application at the US Patent & Trademark Office
A method is provided for coating the substrate of a component, such as a zirconium alloy cladding tube, for use in a water cooled nuclear reactor under normal operating conditions and under high temperature oxidation conditions. The method includes heating a pressurized carrier gas to a temperature between 200.degree. C. and 1200.degree. C., adding chromium or chromium-based alloy particles having an average diameter of 20 microns or less to the heated carrier gas, and spraying the carrier gas and particles onto the substrate at a velocity, preferably from 800 to 4000 ft./sec. (about 243.84 to 1219.20 meters/sec.), to form a chromium and/or chromium-based alloy coating on the substrate to a desired thickness.
LAHODA, EDWARD J. (EDGEWOOD, PA), XU, PENG (COLUMBIA, SC), KAROUTAS, ZESES (LEXINGTON, SC), RAY, SUMIT (COLUMBIA, SC), SRIDHARAN, KUMAR (MADISON, WI), MAIER, BENJAMIN (WAUNAKEE, WI), JOHNSON, GREG (MADISON, WI)
WESTINGHOUSE ELECTRIC COMPANY LLC (CRANBERRY TOWNSHIP PA), WISCONSIN ALUMNI RESEARCH FOUNDATION (MADISON WI)
15/ 284,076
October 3, 2016
STATEMENT REGARDING GOVERNMENT RIGHTS [0002] This invention was made with government support under Contract No. DE-NE0008222 awarded by the Department of Energy. The U.S. Government has certain rights in this invention.