Title :
Nb/sub 3/Sn multifilamentary wires with CuNb reinforcing stabilizer
Author :
Watanabe, K. ; Hoshi, A. ; Awaji, S. ; Katagiri, K. ; Noto, K. ; Goto, K. ; Sugimoto, M. ; Saito, T. ; Kohno, O.
Author_Institution :
Inst. for Mater. Res., Tohoku Univ., Sendai, Japan
fDate :
3/1/1993 12:00:00 AM
Abstract :
A bronze processed multifilamentary Nb/sub 3/Sn superconducting wire with CuNb reinforcing stabilizer (CuNb/Nb/sub 3/Sn), which exhibits a residual resistance ratio of 20 and a magnetoresistance of 0.2 mu Omega -cm at 23 T and 4.2 K, has been developed. The yield stress at 4.2 K, was noticeably improved; a value of 22 kg/mm/sup 2/ was obtained even after heat treatment of Nb/sub 3/Sn formation at 700 degrees C for 200 h. The effect of strain on critical current density, J/sub c/, was described well by using the upper critical field in the prestrain state. It was verified that the CuNb/Nb/sub 3/Sn wire mechanical and superconducting properties need to perform under an enormous electromagnetic force in high magnetic fields.<>
Keywords :
composite superconductors; copper alloys; critical current density (superconductivity); deformation; heat treatment; niobium alloys; superconducting critical field; tin alloys; type II superconductors; yield stress; 23 T; 4.2 K; 700 degC; Nb/sub 3/Sn-CuNb; critical current density; electromagnetic force; heat treatment; magnetoresistance; multifilamentary wires; reinforcing stabilizer; residual resistance ratio; strain; superconductors; upper critical field; yield stress; Capacitive sensors; Critical current density; Heat treatment; Magnetic properties; Magnetoresistance; Multifilamentary superconductors; Niobium; Residual stresses; Superconducting filaments and wires; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
