Superconducting properties and thermal stability of high-strength Nb 3Sn wire with ta-reinforced filaments

Gen Nishijima, Kazuo Watanabe, Satoru Murase, Kazumune Katagiri, Genzo Iwaki

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Superconducting properties of high-strength Nb3Sn wires with Ta-reinforced filaments were evaluated at various temperatures and magnetic fields. Mechanical properties were also investigated at 4.2 K. The critical current was measured at temperatures up to 14 K and in magnetic fields up to 15 T. The data were well scaled by using empirical scaling laws. The stress-strain curve showed that the stress corresponding to 0.5% strain was 284 MPa. The value is twice as large as that of conventional Nb3Sn wires, indicating that the high-strength Ta reinforcement enhances the mechanical property of the wire. Furthermore, the wire was sufficiently ductile. To evaluate the thermal stability, minimum quench energy and normal zone propagation velocity were measured under a cryocooled condition. The Ta reinforced Nb3Sn wire shows relatively high stability and large propagation velocity. The results suggest that the Ta reinforced Nb3Sn wire has sufficient applicability for cryocooled superconducting magnet windings.

Original languageEnglish
Pages (from-to)3442-3445
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2 PART III
Publication statusPublished - 2005 Jun
Externally publishedYes


  • Critical current
  • Cryocooled condition
  • Mechanical property
  • NbSn superconducting wire
  • Ta-reinforcement
  • Thermal stability
  • Upper critical field

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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