DocumentCode :
1370287
Title :
Evolution of Electromagnetic Properties and Microstructure With Sintering Temperature for 
Wires Made by Combined In-Situ/Ex-Situ Process
Author :
Li, W.X. ; Zeng, R. ; Zhang, Y. ; Xu, X. ; Li, Yuhua ; Dou, S.X.
Author_Institution :
Inst. for Supercond. & Electron. Mater., Univ. of Wollongong, Wollongong, NSW, Australia
Volume :
21
Issue :
3
fYear :
2011
fDate :
6/1/2011 12:00:00 AM
Firstpage :
2635
Lastpage :
2638
Abstract :
The influences of microstructure, connectivity, and disorder on the critical current density, Jc, are discussed to clarify the different mechanisms of Jc(H) in different magnetic field ranges for in-situ and combined in-situ/ex-situ MgB2/Fe wires. Sintering temperature plays a very important role in the electromagnetic properties at different temperatures and under various magnetic fields. Connectivity, upper critical field, Hc2 , and irreversibility field, Hirr, are studied to demonstrate the mechanism of Jc dependence on magnetic field. The combined in-situ/ex-situ process is proved to be a promising technique for fabrication of practical MgB2 wires.
Keywords :
critical current density (superconductivity); distortion; iron; magnesium compounds; sintering; superconducting critical field; superconducting materials; MgB2-Fe; combined in-situ/ex-situ process; connectivity; critical current density; disorder; electromagnetic properties; irreversibility field; microstructure; sintering temperature; superconducting wires; upper critical field; Crystals; Microstructure; Superconducting magnets; Temperature; Temperature dependence; Temperature measurement; Wires; ${rm MgB}_{2}$ ; Connectivity; critical current density; distortion;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2010.2084555
Filename :
5621857
Link To Document :
