Effect of zirconia (3 mol% yttria) additive on mechanical properties and structure of alumina ceramics

The effects of ZrO2-3 mol% Y2O3 additives containing 7.3, 15, 23.3 and 32 vol% of ZrO2 on the bending strength, fracture toughness, hardness and the microstructure of hot-pressed alumina-based ceramics were investigated. The presence of the m-, t- and t'-ZrO2 phases was discovered by using XRD...

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Bibliographic Details
Published in:Journal of materials science 1994-09, Vol.29 (17), p.4633-4638
Main Authors: GRIGORYEV, O. N, FIRSTOV, S. A, BABIY, O. A, ORLOVSKAYA, N. A, HOMENKO, G. E
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
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Summary:The effects of ZrO2-3 mol% Y2O3 additives containing 7.3, 15, 23.3 and 32 vol% of ZrO2 on the bending strength, fracture toughness, hardness and the microstructure of hot-pressed alumina-based ceramics were investigated. The presence of the m-, t- and t'-ZrO2 phases was discovered by using XRD and TEM. An inhomogeneous distribution of Y2O3 in the ZrO2 grains was observed. The variation of the mechanical properties of the ceramics is explained by the influence of different toughening mechanisms and by a change in the structure of the material. 16 refs.
ISSN:0022-2461
1573-4803
DOI:10.1007/BF00376289