Multi-seeded melt crystallization of YBCO bulk material for cryogenic applications

Multi-seeded melt crystallization of YBCO bulk material for cryogenic applications

YBCO bulk materials were crystallized by a multi-seeded melt growth process. Up to four biaxial oriented Sm-123 seeds were placed on the top of rectangular shaped YBCO bars (up to 100x40x15 mm super(3)). The oriented grown single grains are joined by partially coherent grain boundaries with an impro...

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Veröffentlicht in:Superconductor science & technology 1999-02, Vol.12 (2), p.69-76
Hauptverfasser: Schaetzle, P, Krabbes, G, Stoever, G, Fuchs, G, Schlaefer, D
Format: Artikel
Sprache:eng
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Zusammenfassung:YBCO bulk materials were crystallized by a multi-seeded melt growth process. Up to four biaxial oriented Sm-123 seeds were placed on the top of rectangular shaped YBCO bars (up to 100x40x15 mm super(3)). The oriented grown single grains are joined by partially coherent grain boundaries with an improved current transport capability and high levitation forces with overall values of 55-65 N. Segregation of nonsuperconducting rest melt and microcracks limit the current transport across the grain boundary.
ISSN:0953-2048
DOI:10.1088/0953-2048/12/2/003