Superconducting and structural properties of plasma sprayed YBaCuO layers deposited on metallic substrates

Herman K. Hemmes, D Jäger, M.A. Smithers, M. Smithers, J. van der Veer, J.M. van der Veer, D. Stover, Horst Rogalla

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Abstract

The properties of plasma sprayed Y-Ba-Cu-O coatings deposited on metallic substrates are studied. Stainless steel, nickel steels and pure nickel are used as substrate. Y-Ba-Cu-O deposited on stainless steel and nickel steel reacts with the substrate. This interaction can be suppressed by using an yttria-stabilized zirconia (YsZ) diffusion barrier. However, after heat treatment the Y-Ba-Cu-O layers on YsZ show cracks perpendicular to the surface. As a result the critical current density is very low. The best results are obtained for Y-Ba-Cu-O deposited on pure nickel; here no cracks perpendicular to the surface are observed. The critical current increases with the anneal temperature but annealing for longer than 10 h does not seem to improve the superconducting properties any further.
Original languageUndefined
Pages (from-to)302-307
Number of pages6
JournalCryogenics
Volume33
Issue number33
DOIs
Publication statusPublished - 1993

Keywords

  • METIS-128539
  • IR-23740

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