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

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Advances in Cryogenic Engineering

OSTI ID:482083

Balachandran, U; Iyer, A N; Jammy, R ^[1]

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1. Argonne National Lab., IL (United States); and others

Fabricating long lengths of robust and high-quality conductors is imperative for various applications of high-T{sub c} superconductors. Long lengths of mono- and multifilament Ag-clad Bi-Sr-Ca-Cu-O 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-T{sub c} 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 ({epsilon} {approx}1%) than that of monofilament conductor ({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 Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38; AC02-76CH00016
• OSTI ID: 482083
• Report Number(s): CONF-950722--
• Journal Information: Advances in Cryogenic Engineering, Journal Name: Advances in Cryogenic Engineering Vol. 42B; ISSN ACYEAC; ISSN 0065-2482
• Country of Publication: United States
• Language: English

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