In:
Solid State Phenomena, Trans Tech Publications, Ltd., Vol. 106 ( 2005-9), p. 83-86
Abstract:
This work was directed at a comprehensive study of the role of the nanostructure and nanochemistry on the transport properties of yttria-stabilized zirconia. Alumina additions lead to a decrease of sgb when the samples have clean grain boundaries, while sgb goes through a maximum in samples having glassy grain boundaries. The differences were attributed to the strong interaction between Al2O3 and SiO2 impurities leading to a glassy phase depletion at the grain-boundaries, due to a change in wettability. Moreover, XPS analyses show that Si and Y segregate near these interfaces according to a kinetic demixing process, explaining why a faster cooling rate after sintering has a beneficial effect on sgb.
Type of Medium:
Online Resource
ISSN:
1662-9779
DOI:
10.4028/www.scientific.net/SSP.106
DOI:
10.4028/www.scientific.net/SSP.106.83
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2005
detail.hit.zdb_id:
2051138-3
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