DocumentCode
1126588
Title
Development of 
Powders and Study of the Properties and Architecture of Ex-Situ PIT Wires
Author
Vignolo, Maurizio ; Romano, Gennaro ; Malagoli, Andrea ; Braccini, Valeria ; Bernini, Cristina ; Tropeano, Matteo ; Martinelli, Alberto ; Cubeda, Valeria ; Tumino, Andrea ; Putti, Marina ; Ferdeghini, Carlo ; Siri, Antonio S.
Author_Institution
CNR-INFM LAMIA, Genoa
Volume
18
Issue
2
fYear
2008
fDate
6/1/2008 12:00:00 AM
Firstpage
1175
Lastpage
1178
Abstract
MgB2 tapes and wires have been synthesized through the ex-situ Powder-In-Tube (PIT) method. We studied the effects of using different metallic materials for the sheaths in new round or square shaped multifilamentary wires; enhanced critical currents in 19 filaments wires are reported. The influence of the starting powders on the superconducting properties of the final conductors was thoroughly investigated in order to improve their behavior in magnetic field. In particular we analyzed the effect of controlling the grain size in the powders by high energy ball milling and by lowering the synthesis temperature. TEM analysis results are shown that highlight the role played by the amorphous layer at the grain boundaries.
Keywords
ball milling; boron alloys; grain boundaries; magnesium alloys; superconducting materials; wires; ex-situ powder-in-tube wire; grain boundary; grain size; high energy ball milling; magnetic field behavior; superconducting wires; Critical current; magnesium diboride; superconducting wires;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2008.920666
Filename
4484941
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