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Influence of Y2BaCuO5 particles on the YBa2Cu3Ox matrix in melt-textured YBCO superconductors

Anjela D. Koblischka-Veneva 2,  Michael R. Koblischka 1,  K. Ogasawara 3,  F Mücklich 2,  M. Murakami 3,4

1. University of Saarbruecken, Institute of Experimental Physics (USAAR), P.O.Box 151150, Saarbrücken 66041, Germany
2. University of the Saarland, Institute for Functional Materials, P.O.Box 15 11 50, Saarbrücken 66041, Germany
3. International Superconductivity Technology Centre, Superconductivity Research Laboratory (SRL/ISTEC), 1-10-13, Shinonome, Koto-ku, Tokyo 135-0062, Japan
4. Department of Materials Science and Engineering, Shibaura Institute of Technology, 3-9-14, Shibaura,Minato-ku, Tokyo 108-8548, Japan

Abstract

By means of automated electron backscatter diffraction (EBSD) analysis, we studied the local orientations of embedded Y2BaCuO5 (211) particles within melt-textured YBa2Cu3Ox (YBCO) samples. On both components, we obtained high-quality Kikuchi patterns, thus allowing the automated mapping of the crystal orientations and a two-phase analysis of the samples. Investigations were performed on a variety of melt-textured YBCO samples, also including samples prior to the oxygen treatment.
In melt-textured YBCO with (0 0 1) orientation, we find that the embedded 211 particles do not have any preferred orientation, but the maps also reveal that at certain orientations of the 211 particles the YBCO growth is not altered. From the obtained EBSD mappings, we can conclude that the formation of small 211 particles will not disturb the YBCO matrix growth, whereas the presence of large 211 particles causes severe changes in the YBCO growth, leading to the formation of subgrains. The EBSD results are presented in form of local orientation maps and local pole figures.

 

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Presentation: poster at E-MRS Fall Meeting 2004, Symposium E, by Anjela D. Koblischka-Veneva
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-04-28 16:56
Revised:   2009-06-08 12:55