Reference : From RE-211 to RE-123. How to control the final microstructure of superconducting sin...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/140328
From RE-211 to RE-123. How to control the final microstructure of superconducting single-domains
English
Cloots, Rudi [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT >]
Koutzarova, T. [SUPRATECS, Chemistry Institute B6, University of Liège, Sart Tilman, B-4000 Liège, Belgium]
Mathieu, J.-P. [SUPRATECS, Chemistry Institute B6, University of Liège, Sart Tilman, B-4000 Liège, Belgium]
Ausloos, Marcel [Université de Liège - ULiège > Département de physique > Département de physique >]
2005
Superconductor Science and Technology
Institute of Physics
18
3
R9-R23
Yes (verified by ORBi)
International
0953-2048
Bristol
United Kingdom
[en] Defects ; Dissolution ; Grain boundaries ; Growth (materials) ; Interfaces (materials) ; Magnetic field effects ; Microstructure ; Nucleation ; Single crystals ; Yttrium barium copper oxides ; Microstructural defects ; Parasite nucleation ; Single-domain bulk superconductors ; Trapping theory ; Superconducting materials
[en] This paper reviews the usual techniques for producing YBCO-type single-domains and the microstructure of the as-obtained samples. The problems of seed dissolution and parasite nucleations are discussed in detail. The formation of microstructural defects, such as pores and cracks, is examined. An important part of this review is devoted to the study of the influence of RE-211 particles (RE2BaCuO5 where RE denotes Y, Yb, Nd, Sm, Dy, Gd, Eu or a mixture of them. Generally Nd4Ba2Cu 2O10 is preferred to Nd2BaCuO5) for the microstructure and properties of RE-Ba-Cu-O single-domains. Pushing/trapping theory is described in order to explain the spatial distribution of RE-211 particles in the RE-123 ((RE)Ba2Cu3O7-δ) monoliths. The formation of RE-211-free regions is discussed. Different ways to limit the RE-211 coarsening are reviewed. Microstructural defects in the RE-123 matrix caused by the RE-211 particles are presented. It is also shown that RE-211 particles play a significant role in the mechanical properties of single-domain samples. We finish this review by discussing the infiltration and growth process as a good technique to control the microstructure. © 2005 IOP Publishing Ltd.
http://hdl.handle.net/2268/140328
10.1088/0953-2048/18/3/R01

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