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Properties and performance of fine-filament bronze-process Nb3Sn conductorsFine-filament bronze-process Nb3Sn superconductors were fabricated to fulfill stringent requirements on critical current under tension in a one-inch bend diameter, current density, stability, and conductor losses. A large fraction of niobium filaments was incorporated in a bronze matrix, and a cable containing 4453 2-micron diameter filaments in each of six strands provided a current density of 85,000 A/sq cm at 10 to the -11th ohm-cm, 10 T, and 4.2 K. The next step was to incorporate copper stabilizer in a conductor with 20,538 filaments. These conductors, fabricated so that bend strains of about 1% would be experienced by the filaments in the one-inch bend, stably carried currents in the 200-500 A range. A quench current of 540 A in a 5-cm bend corresponds to 158,000 A/sq cm in the bronze and filament area, believed to be the highest critical current density reported for multifilamentary Nb3Sn.
Document ID
19790036516
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Walker, M. S.
(Intermagnetics General Corp. Guilderland, NY, United States)
Cutro, J. M.
(Intermagnetics General Corp. Guilderland, NY, United States)
Zeitlin, B. A.
(Intermagnetics General Corp. Guilderland, NY, United States)
Ozeryansky, G. M.
(Intermagnetics General Corp. Guilderland, NY, United States)
Schwall, R. E.
(Intermagnetics General Corp. Guilderland, N.Y., United States)
Oberly, C. E.
(USAF Wright-Patterson AFB, Ohio, United States)
Ho, J. C.
(Wichita State University Wichita, Kan., United States)
Woollam, J. A.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Subject Category
Solid-State Physics
Accession Number
79A20529
Distribution Limits
Public
Copyright
Other

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