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Processing and fabrication of YBa sub 2 Cu sub 3 O sub x /Ag composite wires and coils [electronic resource].

Published
Washington, D.C. : United States. Dept. of Defense, 1990.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: (16 pages) : digital, PDF file
Additional Creators
Argonne National Laboratory, United States. Department of Defense, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Silver was added to YBa₂Cu₃Oₓ (123) powder by a melt technique using AgNO₃ and heated to ∼600°C to decompose the nitrate. This process yields 123 powder that is uniformly coated with Ag, as indicated by optical and scanning electron microscopy (SEM). The composite power is formed into rods (∼4 mm diameter) via drawing and swaging through conical converging dies. Wires of finer diameter (∼1 mm) and substantially greater linear uniformity have been produced by slurry extrusion of the composite powder in a polymeric vehicle. Transport critical current density, J{sub c}, of these wires at present is about 750 A/cm². This value may be expected to rise due to further reduction of second phase impurities localized at grain boundaries and better understanding of the Ag/superconductor interface. This paper describes the wire fabrication in some detail and discusses the results of microscopic analyses by scanning electron microscopy (SEM), x-ray photoemission spectroscopy (XPS), and x-ray diffraction (XRD). 11 refs., 4 figs., 1 tab.
Report Numbers
E 1.99:conf-901125-8
conf-901125-8
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Note
Published through SciTech Connect.
01/01/1990.
"conf-901125-8"
"DE91006532"
2. international ceramic science and technology congress, Orlando, FL (USA), 12-15 Nov 1990.
Singh, J.P.; Balachandran, U.; Dusek, J.T.; Dorris, S.E.; Poeppel, R.B.; Picciolo, J.J.; Mansour, A.N.; Karmarkar, S.D.; Ferrando, W.A.; Divecha, A.P.
Funding Information
W-31109-ENG-38
View MARC record | catkey: 14064915