Abstract—The possibility of implementing two simultaneous strengthening mechanisms in a ceramic system of Al2O3 and ZrO2 is discussed, namely, a transformation mechanism due to the tetragonal form of zirconium dioxide and a dispersion one due to the in situ formation of hexaaluminates of alkaline earth elements. The concentrations of modifying additives of calcium, strontium, and barium oxides that yield the formation of corresponding hexaaluminates have been established. The influence of the formed phases on the microstructure and strength characteristics of the obtained composites is considered. The samples of composites containing strontium cations exhibit high strength characteristics, namely, the flexural strength of 700 MPa and critical stress intensity coefficient K1C up to 10 MPa m1/2, which is due to the effective combined influence of the transformation and dispersion-strengthening effects.
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This study was performed within the framework of the state task, contract no. 075-00715-22-00.
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Podzorova, L.I., Kutuzova, V.E., Il’ichyova, A.A. et al. Composites of the Al2O3/Yb-TZP System Modified with Calcium, Strontium, and Barium Cations. Inorg. Mater. Appl. Res. 13, 1318–1323 (2022). https://doi.org/10.1134/S2075113322050343
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DOI: https://doi.org/10.1134/S2075113322050343