New fabrication process of Cu–Nb composite for internal reinforcement of Nb3sn wires

Hidetoshi Oguro, Satoshi Awaji, Kazuo Watanabe, M. Sugimoto, H. Tsubouchi

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We developed Cu–20vol%Nb wires, for the reinforcement and stabilizing of Nb3Sn wires, using a new Nb rod process. The electrical and mechanical properties of the CuNb wires prepared by different processes were measured to assess their suitability as reinforcing stabilizers for Nb3Sn. All wires were heat-treated at 670 °C, which is the temperature required for formation of Nb3Sn. After heat treatment, the mechanical properties of Nb-rod-processed CuNb were superior to those of in-situ-processed CuNb wires. The residual resistance ratio of the Nb-rod-processed CuNb was 64, and its magnetoresistivity was 0.16 μΩcm at 4.2 K and 15 T. These properties indicate that the new CuNb wire is suitable as a reinforcing stabilizer for using a high field, wide bore, superconducting magnet, such as the 20 T superconducting magnet with 400 mm room temperature bore being planned in Japan.

Original languageEnglish
Pages (from-to)2099-2101
Number of pages3
JournalJournal of Superconductivity and Novel Magnetism
Volume26
Issue number5
DOIs
Publication statusPublished - 2013 Jan 1

Keywords

  • CuNb composite
  • Magneto-resistivity
  • Mechanical properties
  • Nb3Sn wire
  • Residual resistance ratio

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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