Abstract
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-O conductors have been fabricated by the powder-in-tube technique. High values for critical current density (Jc) have been achieved in both short- and long-length conductors. Jc values up to 12,000 A/cm2 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 ≈ 1 T at 4.2 K in a background field of ≈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 (ε ≈1%) than that of monofilament conductor (ε ≈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.
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Balachandran, U., Iyer, A.N., Jammy, R., Haldar, P., Hoehn, J.G., Suenaga, M. (1996). Advances in Fabrication of Mono- and Multifilament Ag-Clad BSCCO Superconductors. In: Summers, L.T. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering Materials , vol 42. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9059-7_101
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DOI: https://doi.org/10.1007/978-1-4757-9059-7_101
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