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Al2O3-Based Ceramic Composites with a High Brittle Fracture Resistance

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Abstract—

We examine synthesis conditions of precursors to ZrO2–Al2O3–CeO2 powders modified with calcium cations. The precipitation procedure and the aging of reaction systems of precursors to the synthesized composites are shown to influence the morphology and particle size of the nanopowders and the evolution of the phase composition, microstructure, and mechanical characteristics of composites prepared from them. The composites offer a high brittle fracture resistance due to the combined effect of transformation and dispersion hardening owing to the presence of T-ZrO2-based solid solutions and calcium hexaaluminates (bending strength, up to 1000 MPa; fracture toughness KIc, up to 10.5 MPa m1/2).

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, 119334, Moscow, Russia

    L. I. Podzorova, A. A. Il’icheva, O. I. Pen’kova, O. S. Antonova, A. S. Baikin & A. A. Konovalov

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  1. L. I. Podzorova
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  2. A. A. Il’icheva
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  3. O. I. Pen’kova
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  4. O. S. Antonova
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  5. A. S. Baikin
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  6. A. A. Konovalov
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Correspondence to L. I. Podzorova.

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Translated by O. Tsarev

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Podzorova, L.I., Il’icheva, A.A., Pen’kova, O.I. et al. Al2O3-Based Ceramic Composites with a High Brittle Fracture Resistance. Inorg Mater 55, 628–633 (2019). https://doi.org/10.1134/S0020168519060128

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  • DOI: https://doi.org/10.1134/S0020168519060128

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