Title :
Development of Fe-sheathed MgB2 wires and tapes for electric power applications
Author :
Fang, H. ; Gijavanekar, P. ; Zhou, Y.X. ; Putman, P.T. ; Salama, K.
Author_Institution :
Dept. of Mech. Eng., Univ. of Houston, TX, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
Superconducting coils with different dimensions were manufactured via a wind-reaction process by using Fe-sheathed MgB2 wires, which were fabricated using the powder-in-tube method and ultra-fine starting precursors. Very good grain connectivity as well as high core density was obtained in Fe-sheathed wires and tapes. At 20 K and self-field, the critical current of the coil with ID 12 mm and 12 turns is 360 A, which is equivalent to the Jc of 1.8×105 A/cm2. At 6 Tesla external magnetic field and 4.2 K, the coil with ID 14 cm and 10 turns possesses the Jc of 1×104 A/cm2. In-field current carrying capability of MgB2 wires and tapes were further enhanced by Ti additive. These results demonstrate the potential of MgB2 superconducting wires and tapes for large-scale applications.
Keywords :
critical current density (superconductivity); iron; magnesium compounds; superconducting coils; superconducting tapes; type II superconductors; 12 cm; 14 cm; 20 K; 4.2 K; 6 T; Fe; MgB2; critical current density; electric power applications; grain connectivity; magnesium diboride; powder-in-tube method; superconducting coils; superconducting tapes; superconducting wires; ultra-fine starting precursors; wind-reaction process; Coils; Critical current density; Heat treatment; Large-scale systems; Magnetic fields; Manufacturing; Superconducting filaments and wires; Superconducting films; Superconducting magnetic energy storage; Superconductivity; Critical current density; magnesium diboride; powder-in-tube; superconducting;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.848791
