Superconducting Properties of High-Energy Ball-Milled Magnesium Diboride Composites

Author

Ahn, Jung-Ho ; Oh, Sangjun

Author_Institution

Dept. of Mater. Eng., Andong Nat. Univ., Andong, South Korea

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

2784

Lastpage

2787

Abstract

Al-sheathed MgB₂ superconducting wires were fabricated, using pre-reacted and high-energy ball-milled MgB₂ as starting powders. Although the heat treatment of the wires was carried out at a low temperature (500degC) resulting in an insufficient grain connectivity of MgB₂, high-energy ball-milling was beneficial both for the densification and increasing Jc values. The addition of C to MgB₂ increased the critical current density. The addition of Pb content as high as 50 wt.% did not lower the critical temperature (Tc) of MgB₂, while apparently enhancing densification.

Keywords

aluminium; ball milling; composite materials; critical current density (superconductivity); densification; heat treatment; magnesium compounds; powders; superconducting transition temperature; type II superconductors; Al-MgB₂; critical current density; critical temperature; densification; grain connectivity; heat treatment; high-energy ball-milling; magnesium diboride composites; powders; superconducting properties; superconducting wire fabrication; temperature 500 degC; High-energy ball milling; magnesium diboride; superconductors; wires;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018462

Filename

4967862