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 language | English |
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Pages (from-to) | 561-566 |
Number of pages | 6 |
Journal | Materials Science Forum |
Volume | 308-311 |
Publication status | Published - 1999 Jan 1 |
Event | Proceedings of the 1998 5th International Symposium on Functionally Graded Materials, FGM '98 - Dresden, Ger Duration: 1998 Oct 26 → 1998 Oct 29 |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering