Sintering and densification mechanisms of Y2BaCuO5 pellets

Alarco, J. A., Ilyushechkin, A., Bhargava, A. and Yamashita, T. (1999) Sintering and densification mechanisms of Y2BaCuO5 pellets. Materials Science and Engineering B-Solid State Materials for Advanced Technology, 64 2: 130-136. doi:10.1016/S0921-5107(99)00164-6


Author Alarco, J. A.
Ilyushechkin, A.
Bhargava, A.
Yamashita, T.
Title Sintering and densification mechanisms of Y2BaCuO5 pellets
Formatted title
Sintering and densification mechanisms of Y2BaCuO5 pellets
Journal name Materials Science and Engineering B-Solid State Materials for Advanced Technology   Check publisher's open access policy
ISSN 0921-5107
1873-4944
Publication date 1999-09-30
Sub-type Article (original research)
DOI 10.1016/S0921-5107(99)00164-6
Volume 64
Issue 2
Start page 130
End page 136
Total pages 7
Place of publication Lausanne, Switzerland
Publisher Elsevier Science SA
Collection year 1999
Language eng
Subject C1
291499 Materials Engineering not elsewhere classified
780102 Physical sciences
Formatted abstract
The sintering and densification of Y2BaCuO5 (Y-211) pellets made from powders with different characteristics have been investigated in the temperature range 1000–1140°C. A pellet made from powder containing Ba-rich secondary phases shows very early liquid-assisted sintering and densification and clear evidence of exaggerated grain growth. The melting of BaCuO2 and YBa2Cu3O7−δ (Y-123) secondary phases increases the rate of densification of Y-211 pellets made from other powders at temperatures above 1025–1030°C. All the liquid produced by the melting of the latter phases recrystallizes as intergranular layers of Y-123. These intergranular layers account for the darker appearance and for measurable electrical conductivities at room temperature of the pellets sintered at the higher temperatures. The development of exaggerated grain growth within a uniform fine-grained matrix opens the possibility of using controlled secondary recrystallization to obtain large single domains of Y-211, provided that the trapping of porosity can be avoided or minimized.
© 1999 Elsevier Science S.A.
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Tue, 10 Jun 2008, 14:04:10 EST