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SiC addition for MgB/sub 2/ superconducting wire by suspension spinning

Goto, T. ; Watanabe, K. ; Nishijima, G.

IEEE transactions on applied superconductivity, 2005-06, Vol.15 (2), p.3341-3344 [Periódico revisado por pares]

IEEE

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  • Título:
    SiC addition for MgB/sub 2/ superconducting wire by suspension spinning
  • Autor: Goto, T. ; Watanabe, K. ; Nishijima, G.
  • Assuntos: Critical current ; Fabrication ; Flux pinning ; Iron ; magnesium diboride ; Magnetic fields ; Powders ; Silicon carbide ; Spinning ; Superconducting filaments and wires ; Superconducting materials ; Superconductivity ; suspension spinning
  • É parte de: IEEE transactions on applied superconductivity, 2005-06, Vol.15 (2), p.3341-3344
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
  • Descrição: The effect of nanoscale SiC addition on the field dependence of J/sub c/ for MgB/sub 2/ superconducting wire by suspension spinning was examined to enhance the flux pinning. The suspension spinning of commercially available MgB/sub 2/ and SiC powders was examined to fabricate a long superconducting MgB/sub 2/ wire by using the spinning medium of poly(vinyl alcohol) (PVA) or polyacrylonitrile (PAN). The as-drawn filaments were uniaxially pressed under 20 MPa at 200/spl deg/C for 8 h to remove volatile components and connect the MgB/sub 2/ grains. The filamentary samples were enveloped by an iron sheet with a pellet of mixed powder of Mg and B to prevent Mg loss, and vacuum-sealed in a fused quartz tube and sintered. The field dependence of J/sub c/ for the samples was examined at 4.2 K in magnetic fields up to 14 T. The J/sub c/ of the sample was strongly dependent on the spinning medium and sintering condition. Addition of 5 at% SiC in the sample spun by PVA medium attained the maximum J/sub c/ value more than 1000 A/cm/sup 2/ at 4.2 K by applying the field of 14 T.
  • Editor: IEEE
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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