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Precursor composites for oxygen dispersion hardened silver sheathed superconductor composites

United States Patent

June 22, 1999
View the Complete Patent at the US Patent & Trademark Office
An oxide superconductor composite having improved texture and durability. The oxide superconductor composite includes an oxide superconductor phase substantially surrounded with/by a noble metal matrix, the noble metal matrix comprising a metal oxide in an amount effective to form metal oxide domains that increase hardness of the composite. The composite is characterized by a degree of texture at least 10% greater than a comparable oxide superconductor composite lacking metal oxide domains. An oxide superconducting composite may be prepared by oxidizing the precursor composite under conditions effective to form solute metal oxide domains within the silver matrix and to form a precursor oxide in the precursor alloy phase; subjecting the oxidized composite to a softening anneal under conditions effective to relieve stress within the noble metal phase; and converting the oxide precursor into an oxide superconductor.
Podtburg; Eric R. (Natick, MA)
American Superconductor Corp (Westborough, MA)
08/ 626,130
April 5, 1996
The U.S. Department of Energy may have certain rights to this invention under government contract No. DE-FG02-93ER81605.