Spark Plasma Sintering of Ceramic Materials Based on Rare-Earth Zirconates

Powders of rare-earth (RE) zirconates La 2 Zr 2 O 7 and ZrO 2 – 8Y 2 O 3 were synthesized by reverse chemical precipitation to obtain ceramic materials based on them by spark-plasma sintering. Formation of the ceramic phase composition during consolidation by spark-plasma sintering was studied. The...

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Bibliographic Details
Published in:Refractories and industrial ceramics 2023-03, Vol.63 (6), p.659-664
Main Authors: Oglezneva, S. A., Porozova, S. E., Kachenyuk, M. N., Kul’met’eva, V. B., Smetkin, A. A.
Format: Article
Language:English
Subjects:
Ceramic materials
Ceramics
Characterization and Evaluation of Materials
Chemical precipitation
Chemical synthesis
Chemistry and Materials Science
Composites
Glass
Materials Science
Natural Materials
Phase composition
Powders
Rare earth elements
Sintering
Sintering (powder metallurgy)
Spark plasma sintering
Thermal barrier coatings
Thermal conductivity
Thermal stability
Zirconates
Zirconium dioxide
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Summary:Powders of rare-earth (RE) zirconates La 2 Zr 2 O 7 and ZrO 2 – 8Y 2 O 3 were synthesized by reverse chemical precipitation to obtain ceramic materials based on them by spark-plasma sintering. Formation of the ceramic phase composition during consolidation by spark-plasma sintering was studied. The thermal conductivity of ceramics based on RE zirconates at 400°C was 1.79 W/(m·K), which was less than those of La 2 Zr 2 O 7 [2.06 W/(m·K)] and ZrO 2 – 8Y 2 O 3 [2.4 W/(m·K)]. Use of RE oxide concentrate was shown to be promising for obtaining a ceramic layer of thermal barrier coatings with thermal stability at temperatures above 1200°C.
ISSN:1083-4877
1573-9139
DOI:10.1007/s11148-023-00787-0