Studies of the phase evolution of YBCO materials with different additives
Riches, J.D., Alarco, J.A., & Barry, J.C. (1998) Studies of the phase evolution of YBCO materials with different additives. Superconductor Science and Technology, 11(10), pp. 963-967.
Y123 samples with varying amounts of added Y211, PtO 2 and CeO 2 have been melt processed and quenched from temperatures between 960°C and 1100°C. The microstructures of the quenched samples have been characterized using a combination of x-ray diffractometry, optical microscopy, scanning electron microscopy, microprobe analysis, energy-dispersive x-ray spectroscopy and wavelength-dispersive x-ray spectroscopy. The Ba-Cu-O-rich melt undergoes complex changes as a function of temperature and time. A region of stability of BaCuO 2 (BC1) and BaCu 2O 2 (BC2) exists below 1040°C in samples of Y123 + 20 mol% Y211. Ba 2Cu 3O 5 is stabilized by rapid quenching but appears to separate into BC1 and BC2 at lower quenching rates. PtO 2 and CeO 2 additions affect the distribution and volume fractions of the two Ba-Cu-oxide phases.
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|Item Type:||Journal Article|
|Additional Information:||Cited By (since 1996):4
Export Date: 5 November 2013
Language of Original Document: English
Correspondence Address: Department of Physics, University of Queensland, QLD 4072, Australia
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|Divisions:||Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Deposited On:||07 Nov 2013 01:00|
|Last Modified:||07 Nov 2013 01:00|
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