Recent advances in processing of Ag-clad Bi-2223 superconductors
- Argonne National Lab., IL (United States)
- Univ. of Pittsburgh, PA (United States). Dept. of Materials Science and Engineering; and others
Enhancements in the transport current properties of long lengths of multifilament Ag-sheathed (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y} (Bi-2223) superconducting tapes were made as a function of increased packing density of precursor powder, improved mechanical deformation, and adjusted cooling rate. Improved processing parameters had a pronounced effect on the transport critical current (I{sub c}) of the superconducting tapes, at 77 K and zero applied magnetic field, an I{sub c} of 60 A was obtained in short length samples (4 cm), an I{sub c} of 54 A in a 164 m length, and 18 A in a 1,260 m length. These enhancements were based on the increase in packing density accompanied with improved mechanical deformation and cooling schedule. Maximum critical current values were two to three times higher in slow-cooled tapes than in fast-cooled tapes.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 561874
- Report Number(s):
- ANL/ET/CP--91938; CONF-970758--; ON: DE97054177
- Country of Publication:
- United States
- Language:
- English
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