Title
Phase assembly and microstructure of <tex>$CeO_{2}$</tex>-doped <tex>$ZrO_{2}$</tex> ceramics prepared by spark plasma sintering Phase assembly and microstructure of <tex>$CeO_{2}$</tex>-doped <tex>$ZrO_{2}$</tex> ceramics prepared by spark plasma sintering
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Barking ,
Subject
Physics
Source (journal)
Journal of the European Ceramic Society. - Barking
Volume/pages
25(2005) :15 , p. 3437-3442
ISSN
0955-2219
ISI
000232172100006
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
CeO2-doped ZrO2, (8 mol%) starting powder was sintered by means of spark plasma sintering (SPS) at 1300 degrees C without holding time. The stability of the tetragonal ZrO2 phase in the Ce-ZrO2 ceramic sintered under strongly reducing conditions was investigated. The SPS sample consisted of monoclinic and tetragonal ZrO2 phase, with a volume ratio of two to one, as well as a trace amount of a Zr-Ce-O cubic solid solution phase. In contrast, the same powder sintered by hot-pressing in nitrogen at 1300 and 1500 degrees C for 1h showed no tetragonal ZrO2. Microstructural observation of the SPS ceramic by SEM and TEM revealed grains with and without twins. The reason for the appearance of the tetragonal phase in the SPS sample sintered under strongly reducing conditions is discussed. (c) 2004 Elsevier Ltd. All rights reserved.
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