Abstract
A study is made of the mechanical behavior of ceramics based on ZrO2: a ceramic partially stabilized with MgO and a tetragonal polycrystalline ceramic with an addition of Y2O3. It is shown that the Y2O3-stabilized ceramic is linearly elastic, is characterized by a plane R-curve, and exhibits the fracture barrier effect. The ceramic with MgO is inelastic, has an increasing R-curve, and does not exhibit the fracture barrier effect. Data is obtained on acoustic emission in a study of the ceramics, the sources of the emissions being both microscopic and macroscopic defects.
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Translated from Problemy Prochnosti, No. 1, pp. 39–44, January, 1990.
We thank V. I. Galenko, A. I. Fesenko, and A. V. Cheboryukova for their help in performing the experiments.
We are deeply grateful to the Nilcra Corp. (Australia) and the Dai-Ichi Kigenso Company (Japan) for supplying the specimens used in the study.
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Gogotsi, G.A., Drozdov, A.V. & Swain, M. Strength, fracture toughness, and acoustic emission of ceramics based on partially stabilized zirconium dioxide. Strength Mater 23, 45–51 (1991). https://doi.org/10.1007/BF00769951
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DOI: https://doi.org/10.1007/BF00769951