Microstructural characterization of quenched melt-textured YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} materials
- Department of Physics, Chalmers University of Technology/University of Goeteborg, S-412 96 Goeteborg (Sweden)
- Center for Microscopy and Microanalysis, The University of Queensland, Queensland 4072 (Australia)
The microstructure of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (YBCO) materials, melt-textured in air and quenched from the temperature range 900{endash}990{degree}C, has been characterized using a combination of x-ray diffractometry, optical microscopy, scanning electron microscopy, transmission electron microscopy and energy dispersive x-ray spectrometry. BaCu{sub 2}O{sub 2} and BaCuO{sub 2} were found to coexist in samples quenched from the temperature range 920{endash}960{degree}C. The formation of BaCu{sub 2}O{sub 2} preceded the formation of YBCO. Once the YBCO had formed, BaCu{sub 2}O{sub 2} was present at the solidification front filling the space between nearly parallel platelets of YBCO. Large Y{sub 2}BaCuO{sub 5} particles at the solidification front appeared divided into smaller ones as a result of their dissolution in the liquid that quenched as BaCu{sub 2}O{sub 2}. {copyright} {ital 1997 Materials Research Society.}
- OSTI ID:
- 534445
- Journal Information:
- Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 3 Vol. 12; ISSN JMREEE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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