Method for using divider rods for separating superconducting...

Details Method for using divider rods for separating superconducting... Method for using divider rods for separating superconducting...

2007-05-15

2007-05-15

Trinh, Minh (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S825000, C174S125100, C505S928000, C505S930000

Reexamination Certificate

active

10971722

ABSTRACT:
A method for decreasing the effective magnetic filament sizes for high current internal tin Nb3Sn superconductors. During processing composite rods preferably comprised of copper clad Ta rods of approximately the same dimensions as the hexes in the designed filament billet stack are used as dividers in the subelement. Along with the Ta rods, Ta strips are strategically situated against the Nb or Nb alloy barrier tube which surrounds the subelement. The use of Ta as a spacer instead of copper prevents any reasonable likelihood of bridging of the superconducting phases formed after final reaction.

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patent: 5926942 (1999-07-01), Kubo et al.
patent: 6810276 (2004-10-01), Zeitlin
patent: 6981309 (2006-01-01), Hong et al.
O. Kohno, Ti Added Nb3Sn Wires by New Fabrication Processes, IEEE Tranactions of Magnetics, vol. Mag 23, No. 2, Mar. 1987.

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