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Superconducting characteristics of MgB2 wires obtained by Reactive Liquid Mg Infiltration

Published online by Cambridge University Press:  01 February 2011

Giovanni Giunchi ,
Giovanni Ripamonti ,
Elena Perini ,
Tommaso Cavallin ,
Enrico Bassani ,
Umberto Gambardella ,
Yifeng Yang ,
Edward A. Young ,
Marco Bianchetti  and
Carlo Beduz
Giovanni Giunchi
Affiliation:
giovanni.giunchi@edison.it, EDISON SpA, R&D, Foro Buonaparte 31, MILANO, N/A, 20121, Italy, +39-02-62223194, +39-02-62223074
Giovanni Ripamonti
Affiliation:
ale-ripa@libero.it, EDISON SpA, MIlano, N/A, 20121, Italy
Elena Perini
Affiliation:
elena.perini@edison.it, EDISON SpA, MIlano, N/A, 20121, Italy
Tommaso Cavallin
Affiliation:
t.cavallin@cnr.ieni.it, CNR-IENI - Sezione di Lecco, Lecco, N/A, 23900, Italy
Enrico Bassani
Affiliation:
e.bassani@cnr.ieni.it, CNR-IENI - Sezione di Lecco, Lecco, N/A, 23900, Italy
Umberto Gambardella
Affiliation:
gamba@sa.infn.it, CNR-INFM SUPERMAT Lab., University ofSalerno, Baronissi, SA, 84081, Italy
Yifeng Yang
Affiliation:
Y.yang@soton.ac.uk, University of Southampton, Institute of Cryogenics, Southampton, N/A, SO17 1BJ, United Kingdom
Edward A. Young
Affiliation:
E.A.Young@soton.ca.uk, University of Southampton, Institute of Cryogenics, Southampton, N/A, SO17 1BJ, United Kingdom
Marco Bianchetti
Affiliation:
Bianchetti_marco@hotmail.com, University of Southampton, Institute of Cryogenics, Southampton, N/A, SO17 1BJ, United Kingdom
Carlo Beduz
Affiliation:
cb3@soton.ca.uk, University of Southampton, Institute of Cryogenics, Southampton, N/A, SO17 1BJ, United Kingdom
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Abstract

Superconducting MgB2 wires, of different diameter and length, have been produced by the reactive Liquid Mg Infiltration process, also implemented with the addition of extra Mg, to completely fill the internal hole created from the normal infiltration process. The actual wires have an Iron external lining and the metallic Mg internally added has a twofold effect: to avoid Mg deficiency during the reaction and to increase the quenching resistance of the wire. The superconducting characteristics of the wires have been measured either at the liquid He and at the liquid Ne temperatures, on small samples cut from meter long wires. The typical critical current density in self field, at 27.1 K, is about 1000 A/mm2, a value of interest for many power applications. The extension of the manufacturing process to longer wire will be discussed as well as the effect of the metallic lining of the wires on the contact resistance and on the current injection length.

Keywords

superconductingelectron microprobeinfiltration (chemical reaction)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 946: Symposium HH – Recent Advances in Superconductivity , 2006 , 0946-HH04-03
Copyright
Copyright © Materials Research Society 2006

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