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Simultaneous constraint and phase conversion processing of oxide superconductors

United States Patent

April 29, 2003
View the Complete Patent at the US Patent & Trademark Office
A method of making an oxide superconductor article includes subjecting an oxide superconductor precursor to a texturing operation to orient grains of the oxide superconductor precursor to obtain a highly textured precursor; and converting the textured oxide superconducting precursor into an oxide superconductor, while simultaneously applying a force to the precursor which at least matches the expansion force experienced by the precursor during phase conversion to the oxide superconductor. The density and the degree of texture of the oxide superconductor precursor are retained during phase conversion. The constraining force may be applied isostatically.
Li; Qi (Marlborough, MA), Thompson; Elliott D. (Coventry, RI), Riley, Jr.; Gilbert N. (Marlborough, MA), Hellstrom; Eric E. (Madison, WI), Larbalestier; David C. (Madison, WI), DeMoranville; Kenneth L. (Jefferson, MA), Parrell; Jeffrey A. (Roselle Park, NJ), Reeves; Jodi L. (Madison, WI)
American Superconductor Corporation (Westborough, MA)
09/ 665,882
September 20, 2000
This invention was made with the support of the United States government under Department of Energy Grant No. DE-FG02-99ER82742. The United States may have certain rights in the invention.