Grain Growth Kinetics in Alumina-Zirconia (CeZTA) Composites

Grain growth kinetics in alumina‐rich, zirconia–alumina composites have been examined as a function of volume fraction of zirconia. Both he microstructural scale and character alter during grain growth. Grain growth exponents between n= 3 and 4 were observed and have been rationalized in terms of cu...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1994-04, Vol.77 (4), p.939-946
Main Authors: Alexander, Kathleen B., Becher, Paul F., Waters, Shirley B., Bleier, Alan
Format: Article
Language:English
Subjects:
360602 - Other Materials- Structure & Phase Studies
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
CHALCOGENIDES
Chemical industry and chemicals
COMPOSITE MATERIALS
Exact sciences and technology
GRAIN BOUNDARIES
GRAIN GROWTH
GRAIN SIZE
MATERIALS
MATERIALS SCIENCE
MICROSTRUCTURE
Miscellaneous
OXIDES
OXYGEN COMPOUNDS
SIZE
Technical ceramics
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
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Summary:Grain growth kinetics in alumina‐rich, zirconia–alumina composites have been examined as a function of volume fraction of zirconia. Both he microstructural scale and character alter during grain growth. Grain growth exponents between n= 3 and 4 were observed and have been rationalized in terms of current models for grain growth and particle coarsening. Grain growth constants wore measured and compared with available data. Coupled grain growth was observed in that the ratio of the alumina‐to‐zirconia grain size was constant, for a given zirconia content. This behavior is discussed in terms of the topological constraint present during growth and the observed microstructural evolution. The measured activation energies were consistent with boundary‐diffusion‐controlled grain growth.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1994.tb07250.x