High-Strength Tetragonal Zirconia/Alumina Ceramic Composites Containing Strontium Hexaaluminate

— Using powders prepared by a sol–gel hydrolysis process, we have prepared three-phase ceramic composite materials consisting of alpha-alumina, strontium hexaaluminate, and a solid solution based on tetragonal zirconia stabilized with yttrium [3Y-TZP], cerium [12Ce-TZP], or ytterbium cations [3Yb-TZ...

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Bibliographic Details
Published in:Inorganic materials 2021-02, Vol.57 (2), p.192-196
Main Authors: Podzorova, L. I., Il’icheva, A. A., Pen’kova, O. I., Antonova, O. S., Baikin, A. S., Sirotinkin, V. P.
Format: Article
Language:English
Subjects:
Aluminum oxide
Bend strength
Cations
Ceramic powders
Cerium
Chemistry
Chemistry and Materials Science
Composite materials
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Microstructure
Sol-gel processes
Solid solutions
Tetragonal zirconia
Tetragonal zirconia polycrystals
Ytterbium
Yttria-stabilized zirconia
Yttrium
Zirconium dioxide
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Summary:— Using powders prepared by a sol–gel hydrolysis process, we have prepared three-phase ceramic composite materials consisting of alpha-alumina, strontium hexaaluminate, and a solid solution based on tetragonal zirconia stabilized with yttrium [3Y-TZP], cerium [12Ce-TZP], or ytterbium cations [3Yb-TZP]. The cations stabilizing tetragonal zirconia are shown to influence the microstructure of the materials. Having a finer grained microstructure, the [Yb-TZP] matrix composites possess higher strength (bending strength of up to 850 MPa and K Ic of up to 11.3 MPa m 1/2 ).
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168521020102