Phase evolution of the quenched melt of YBa2Cu3O7-y with 20 mol% Y2BaCuO5 additions

Riches, J.D., Alarco, J.A., Yamashita, T., & Barry, J.C. (1998) Phase evolution of the quenched melt of YBa2Cu3O7-y with 20 mol% Y2BaCuO5 additions. Superconductor Science and Technology, 11(9), pp. 830-836.

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Abstract

Samples of YBa2Cu3O7-y + 20 mol% Y2BaCuO5 have been melt processed and quenched from temperatures ranging from 975 to 1100°C. The microstructure of the samples have been characterized via a combination of x-ray diffractometry, optical microscopy, scanning electron microscopy, energy dispersive x-ray spectrometry and wavelength dispersive x-ray spectrometry. BaCuO2 (BC1) and BaCu2O2 (BC2) crystallize from the melt of samples quenched from temperatures between 985 and 1100°C in air. The average yttrium content differs for BC1 and BC2, and it is 4.3 and 5.1 at.%, respectively. Holding times of 20 hours at temperatures above or equal to 1040°C give rise to a dendritic pattern of BC1 surrounded by BC2. The complex changes of the nature of the melt as a function of temperature and time are likely to play a significant role in the mechanism of melt texturing.

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ID Code: 64052
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By (since 1996):7
Export Date: 5 November 2013
Source: Scopus
CODEN: SUSTE
Language of Original Document: English
Correspondence Address: Department of Physics, University of Queensland, QLD 4072, Australia
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DOI: 10.1088/0953-2048/11/9/002
ISSN: 0953-2048
Divisions: Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 07 Nov 2013 00:23
Last Modified: 07 Nov 2013 00:23

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