Investigations on ceria–hafnia system for phase analysis, and HT-XRD studies on a few cubic compositions

The phase relations in the system CeO 2–HfO 2 have been studied under slow cooled conditions. About 10 mol% of HfO 2 was found to be soluble in the CeO 2 lattice under these conditions. All the other compositions were found to be biphasic mixtures of F-type cubic and monoclinic phases. The lattice t...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2006-10, Vol.433 (1), p.203-207
Main Authors: Chavan, S.V., Tyagi, A.K.
Format: Article
Language:English
Subjects:
Ceria
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Hafnia
Materials science
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Phase diagrams of other materials
Phase relation
Physics
Thermal expansion
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Summary:The phase relations in the system CeO 2–HfO 2 have been studied under slow cooled conditions. About 10 mol% of HfO 2 was found to be soluble in the CeO 2 lattice under these conditions. All the other compositions were found to be biphasic mixtures of F-type cubic and monoclinic phases. The lattice thermal expansion behavior was also investigated for a few single phasic as well as biphasic compositions, by means of high temperature XRD. It was found that the compositions with a higher amount of HfO 2 in CeO 2 lattice showed higher thermal expansion behavior.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2006.06.110