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High current density electropolishing in the preparation of highly smooth substrate tapes for coated conductors

United States Patent

March 31, 2009
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
A continuous process of forming a highly smooth surface on a metallic tape by passing a metallic tape having an initial roughness through an acid bath contained within a polishing section of an electropolishing unit over a pre-selected period of time, and, passing a mean surface current density of at least 0.18 amperes per square centimeter through the metallic tape during the period of time the metallic tape is in the acid bath whereby the roughness of the metallic tape is reduced. Such a highly smooth metallic tape can serve as a base substrate in subsequent formation of a superconductive coated conductor.
Kreiskott; Sascha (Los Alamos, NM), Matias; Vladimir (Santa Fe, NM), Arendt; Paul N. (Los Alamos, NM), Foltyn; Stephen R. (Los Alamos, NM), Bronisz; Lawrence E. (Los Alamos, NM)
Los Alamos National Security, LLC (Los Alamos, NM)
10/ 624,350
July 21, 2003
STATEMENT REGARDING FEDERAL RIGHTS This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.