Title :
Effects of bending on cracking and critical current of Nb3Sn ITER wires
Author :
Senkowicz, B.J. ; Takayasu, M. ; Lee, P.J. ; Minervini, J.V. ; Larbalestier, D.C.
Author_Institution :
Appl. Supercond. Center, Univ. of Wisconsin-Madison, Madison, WI, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
Critical current (Ic) measurements and microscopic crack investigations were performed on short samples of ITER (International Thermonuclear Experimental Reactor) wires, designed for the CSMC (Central Solenoid Model Coil), that were bent to curvatures ranging up to 0.3% at room temperature. Ic was found to improve significantly with bending. Microstructural investigation revealed that IGC and VAC samples were nearly crack-free at all bend strains while Furukawa samples had significant cracking due to polishing and unrelated to bending.
Keywords :
bending; cracks; critical current density (superconductivity); niobium alloys; superconducting tapes; tin alloys; type II superconductors; 293 to 298 K; ITER wires; International Thermonuclear Experimental Reactor; Nb3Sn; bend strains; bending; central solenoid model coil; cracking; critical current; microstructure; superconductor; Coils; Critical current; Current measurement; Inductors; Microscopy; Niobium; Performance evaluation; Solenoids; Temperature distribution; Wires; Bending; ITER; critical current; microstructure; superconductor;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849061
