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Bulk superconductors textured and densified by Spark Plasma Sintering

Published online by Cambridge University Press:  07 July 2015

J. G. Noudem ,
L. Dupont  and
P. Bernstein
J. G. Noudem*
Affiliation:
CRISMAT CNRS-UMR6508-ENSICAEN 6 bld Mal Juin 14050 Caen Cedex 04 France LUSAC EA-4253, Université de Caen, Rue Louis Aragon, BP 78, 50130 CHERBOURG-OCTEVILLE, France
L. Dupont
Affiliation:
CAYLAR, 14 rue du Québec, 91140 Villebon-sur-Yvette, France
P. Bernstein
Affiliation:
CRISMAT CNRS-UMR6508-ENSICAEN 6 bld Mal Juin 14050 Caen Cedex 04 France
*
*Email : Jacques.noudem@ensicaen.fr ; fax : +33 231 451 366
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Abstract

In this contribution, we report progress in the preparation of superconducting materials made by Spark Plasma Sintering (SPS). On the one hand, the fabrication process was optimized in order to improve the texturing of Bi2Ca2Sr2CuO8 superconductor ceramics. The new process is referred to as “Spark Plasma Texturing” (SPT). During SPT, the bulk material is free to deform itself. As a result, an inter-grain preferential crystallographic orientation is generated, while materials processed by conventional SPS are usually quasi-isotropic. The crystallographic orientation causes a strong anisotropy in the magnetic properties of the Bi2Ca2Sr2CuO8 bulk.

On the other hand, superconducting MgB2 discs were consolidated using the rapid SPS process. MgB2 has not been yet been seriously considered as a superconductor that could be used for magnetic levitation. Here we present trapped field measurements as a function of the distance to the superconductor and field cooled levitation force measurements that suggests that it presents interesting characteristics for this application.

Keywords

ceramicdensificationmagnetic properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1807: Symposium VV – Science and Technology of Superconducting Materials , 2015 , pp. 7 - 10
Copyright
Copyright © Materials Research Society 2015 

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References

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