Advanced (Nb,Ti) 3Sn superconducting wire with highly strengthened and good conductive CuNb composite stabilizer

K. Watanabe, M. Motokawa, T. Onodera, K. Noto, K. Katagiri, T. Saito

Research output: Contribution to journalConference articlepeer-review

10 Citations (Scopus)

Abstract

We developed advanced (Nb,Ti) 3Sn multifilamentary superconducting wires with 1 mm in diameter and 3 km in length, which were reinforced and stabilized with Cu-20wt.%Nb composite, CuNb/(Nb,Ti) 3Sn. In comparison with practical (Nb,Ti) 3Sn wires with conventional Cu stabilizer, Cu/(Nb,Ti) 3Sn, it is found that a 0.2% proof stress of 240 MPa for CuNb/(Nb,Ti) 3Sn after heat-treatment at 670°C for 200 h is twice as strong as that for Cu/(Nb,Ti) 3Sn. CuNb composite has good thermal conductivity of 200 W/m/K at 4.2 K and low resistivity of 0.16 μΩ·cm at 4.2 K and 15 T. The minimum quench energy of 2.7 mJ at 80% of the critical current at 14 T for CuNb/(Nb, Ti) 3Sn is a factor of two smaller than for Cu/(Nb,Ti) 3Sn, while the normal zone propagation velocity of 2 m/s remains the same.

Original languageEnglish
Pages (from-to)561-566
Number of pages6
JournalMaterials Science Forum
Volume308-311
Publication statusPublished - 1999 Jan 1
EventProceedings of the 1998 5th International Symposium on Functionally Graded Materials, FGM '98 - Dresden, Ger
Duration: 1998 Oct 261998 Oct 29

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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