Advances in fabrication of mono- and multifilament Ag-CLAD BSCCO superconductors

Conference · Sat Jul 01 04:00:00 EDT 1995

OSTI ID:147715

Balachandran, U; Iyer, A N; Jammy, R ^[1]; Haldar, P; Hoehn, Jr, J G ^[2]; Suenaga, M ^[3]

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1. Argonne National Lab., IL (United States)
2. Intermagnetics General Corp., Latham, NY (United States)
3. Brookhaven National Lab., Upton, NY (United States)

Fabricating long lengths of robust and high-quality conductors is imperative for various applications of high-{Tc} superconductors. Long lengths of mono- and multifilament Ag-clad Bi-Sr-Ca-Cu-0 conductors have been fabricated by the powder-in-tube technique. High values for critical current density (J{sub c}) have been achieved in both short- and long-length conductors. J{sub c} values up to 12,000 A/cm{sup 2} have been achieved in an 850-m-long multifilament conductor. Pancake-shaped coils and test magnets fabricated from long-length conductors were characterized at various temperatures and applied magnetic fields. A magnet containing 770 m of high-{Tc} conductor generated a record high field of {approx} 1 T at 4.2 K in a background field of {approx} 20 T. In-situ tensile and bending characteristics of both mono- and multifilament conductors have also been studied. Multifilament conductors exhibited better axial strain tolerance ({var_epsilon} {approx} 1%) than that of monofilament conductor ({var_epsilon} {approx} 0.2%), while retaining 90% of their initial critical current. An analysis of the results is presented, along with effects of parameters such as thickness, superconductor/Ag ratio, and microstructural details.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38; AC02-76CH00016
• OSTI ID: 147715
• Report Number(s): ANL/ET/CP--85329; CONF-950722--13; ON: DE96002754
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
MATERIALS WORKING
MICROSTRUCTURE
POWDERS
SCANNING ELECTRON MICROSCOPY
SILVER
STRAINS
STRONTIUM OXIDES
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY