TY - JOUR

T1 - Advanced (Nb,Ti) 3Sn superconducting wire with highly strengthened and good conductive CuNb composite stabilizer

AU - Watanabe, K.

AU - Motokawa, M.

AU - Onodera, T.

AU - Noto, K.

AU - Katagiri, K.

AU - Saito, T.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - 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.

AB - 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.

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M3 - Conference article

AN - SCOPUS:0032662872

VL - 308-311

SP - 561

EP - 566

JO - Materials Science Forum

JF - Materials Science Forum

SN - 0255-5476

T2 - Proceedings of the 1998 5th International Symposium on Functionally Graded Materials, FGM '98

Y2 - 26 October 1998 through 29 October 1998

ER -