Investigations of growth processes in Y-Ba-Cu-O materials by microstructural examination of quenched samples

Riches, J. D., Habisreuther, T., Litzkendorf, D., Muller, R. and Gawalek, W. (2002) Investigations of growth processes in Y-Ba-Cu-O materials by microstructural examination of quenched samples. Superconductor Science & Technology, 15 4: 499-504. doi:10.1088/0953-2048/15/4/304


Author Riches, J. D.
Habisreuther, T.
Litzkendorf, D.
Muller, R.
Gawalek, W.
Title Investigations of growth processes in Y-Ba-Cu-O materials by microstructural examination of quenched samples
Journal name Superconductor Science & Technology   Check publisher's open access policy
ISSN 0953-2048
Publication date 2002-04
Sub-type Article (original research)
DOI 10.1088/0953-2048/15/4/304
Volume 15
Issue 4
Start page 499
End page 504
Total pages 6
Place of publication Bristol, England
Publisher IOP Publishing Ltd.
Collection year 2002
Language eng
Subject C1
291499 Materials Engineering not elsewhere classified
780102 Physical sciences
Abstract Y-Ba-Cu-O samples with additions of Y2O3 and CeO2 were quenched during seeded isothermal melt processing and examined by optical microscopy and scanning electron microscopy. Large YBa2Cu3O7-y (Y123) particles in the starting powder were found to form a distinct type of melt during heating, which was unaffected by the Y2O3 or CeO2 additives. This type of melt later formed regions with a low concentration of Y2BaCuO5 (Y211) particles in the Y123 matrix. The maximum growth rate of Y123 that could be sustained in the sample was found to be lower in the melt formed from large Y123 particles, and this may lead to growth accidents and subgrains in some samples.
Keyword Physics, Applied
Physics, Condensed Matter
Transport Critical Current
Melt
Y2bacuo5
Superconductors
Solidification
Oxides
Yba2cu3o7-delta
Additions
Size
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Microscopy and Microanalysis Publications
 
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Created: Tue, 14 Aug 2007, 17:26:53 EST