Title :
Fabrication of Ex-Situ MgB2/Al Tapes and the Effects of In and SiC Addition
Author :
Kitaguchi, Hitoshi ; Nakane, Takayuki ; Kumakura, Hiroaki
Author_Institution :
Nat. Inst. for Mater. Sci., Tsukuba
fDate :
6/1/2007 12:00:00 AM
Abstract :
Use of light metal(s) might enhance the possibility MgB2 of conductors in applications. Therefore, we are developing MgB2 tapes using aluminum sheath. As Mg and Al react very easily at high temperatures, we applied an ex-situ PIT process to fabricate MgB2/Al tapes. We have reported that the usage of MgB2 powder prepared from and amorphous B improves performance of ex-situ tapes and that we fabricated MgB2/Al tape with (@4.2 K, 4 T) of 8,600. In this paper, we examine the reproducibility of Jc in the ex-situ MgB2/Al tapes using the MgB2 powder prepared from and MgH2 and amorphous B. We fabricated a new series of MgB2/Al tape and Jc (@4.2 K, 4 T) reaches 11,000. We also investigate the effects of indium and/or SiC addition to the ex-situ MgB2/Al tapes.
Keywords :
aluminium; high-temperature superconductors; indium; magnesium compounds; powder technology; silicon compounds; superconducting tapes; wide band gap semiconductors; In; MgB2-Al; SiC; aluminum sheath; amorphous boron; ex-situ PIT process; ex-situ tapes; high temperatures superconductors; light metal; magnetic flux density 4 T; powder in tube process; superconducting tapes; temperature 4.2 K; Aluminum; Amorphous materials; Conducting materials; Conductors; Costs; Fabrication; Powders; Silicon carbide; Superconducting filaments and wires; Superconducting materials; Critical current densities $({rm J}_{c})$; PIT (powder-in-tube) process; critical temperature $({rm T}_{c})$; magnesium diboride $({rm MgB}_{2})$; superconducting tapes;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.898921
