Title :
Fabrication of MgB2 tapes sheathed with carbon steels by ex situ and in situ methods
Author :
Fujii, Hiroki ; Togano, Kazumasa ; Kumakura, Hiroaki
Author_Institution :
Supercond. Mater. Center, Nat. Inst. for Mater. Sci., Ibaraki, Japan
fDate :
6/1/2003 12:00:00 AM
Abstract :
MgB2 tapes sheathed with carbon steel (CS) were fabricated by a powder-in-tube technique with ex situ and in situ methods. The critical current density (Jc) value of the former tape was about 2 kA/cm2 at 4.2 K and 10 T by heat treatment at 900°C, whereas the Jc value of the latter tape reached about 3 kA/cm2 by heat treatment at temperature as low as 600°C. The Jc anisotropy with respect to field direction of the tapes fabricated by the ex situ method was much larger than that of the tapes fabricated by the in situ method.
Keywords :
carbon steel; critical current density (superconductivity); heat treatment; magnesium compounds; superconducting tapes; type II superconductors; 10 T; 4.2 K; 600 degC; 900 degC; MgB2 tapes; carbon steels; critical current density; heat treatment; powder-in-tube technique; Anisotropic magnetoresistance; Critical current density; Fabrication; Heat treatment; Materials science and technology; Powders; Steel; Superconducting films; Superconducting materials; Superconducting transition temperature;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812204
