Title:
Nb-Al TYPE SUPERCONDUCTING WIRE HAVING STABILIZING COPPER DEPOSIT TENACIOUSLY ADHERENT THERETO AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2006/129540
Kind Code:
A1
Abstract:
An Nb-Al type superconducting wire which is in a state before transformation to an Nb3Al compound. It comprises an Nb-Al type wire in the state of a supersaturated solid solution, a nickel coating film as an interlayer, and a copper coating film tenaciously formed as a stabilizing material on the peripheral surface of the wire through the interlayer. It can be produced from an Nb-Al type wire in the state of a supersaturated solid solution obtained through cooling in liquid gallium, via the following steps: (a) a step in which a gallium residue adherent to the surface of the Nb-Al type wire is removed; (b) a step in which the Nb-Al type wire from which the gallium residue on the surface has been removed in the step (a) is degreased under such conditions as not to passivate the Nb-Al type wire and is then pickled; (c) a step in which the surface of the Nb-Al type wire pickled in the step (b) is electroplated with nickel in a nickel strike bath; and (d) a step in which the surface of the Nb-Al type wire electroplated with nickel in the step (c) is electroplated with copper. From this Nb-Al type superconducting wire, an Nb3Al compound type superconducting wire can be industrially advantageously produced which is useful in a magnet for nuclear fusion reactors, magnet for accelerators, and magnet for nuclear magnetic resonance (NMR) apparatuses having high resolution.
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Inventors:
TSUCHIYA KIYOSUMI (JP)
TAKEUCHI TAKAO (JP)
IKEDA TOKUMI (JP)
HIGUCHI TAMAO (JP)
TAKEUCHI TAKAO (JP)
IKEDA TOKUMI (JP)
HIGUCHI TAMAO (JP)
Application Number:
PCT/JP2006/310386
Publication Date:
December 07, 2006
Filing Date:
May 24, 2006
Export Citation:
Assignee:
HIGH ENERGY ACCELERATOR RES (JP)
NAT INST FOR MATERIALS SCIENCE (JP)
NOMURA PLATING CO LTD (JP)
TSUCHIYA KIYOSUMI (JP)
TAKEUCHI TAKAO (JP)
IKEDA TOKUMI (JP)
HIGUCHI TAMAO (JP)
NAT INST FOR MATERIALS SCIENCE (JP)
NOMURA PLATING CO LTD (JP)
TSUCHIYA KIYOSUMI (JP)
TAKEUCHI TAKAO (JP)
IKEDA TOKUMI (JP)
HIGUCHI TAMAO (JP)
International Classes:
H01B13/00; C25D3/12; C25D5/50; C25D7/06; C25F1/00; C25F1/08; H01B12/10
Foreign References:
| JP2000090754A | 2000-03-31 | |||
| JP2000113748A | 2000-04-21 | |||
| JP2000243158A | 2000-09-08 |
Attorney, Agent or Firm:
Iwatani, Ryo (1-31 Dojima 2-chome, Kita-k, Osaka-shi Osaka 03, JP)
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