An investigation of phase transformations, taking place in a composite ZrO2(Y)–Al2O3 ceramic material sintered from ultrafine powders manufactured by a plasmochemical process, is performed during its storage and subsequent thermal heating. The composite low-porosity ceramics based on zirconium dioxide is found to be stable in interactions with the environment during long-term storage under standard conditions and thermal heating. A high efficiency of a spontaneous t→m phase transformation is observed in the composite ceramics with an open porosity of more than 6%. The composite ceramics, in which low porosity is combined with a reduced content of the stabilizing yttrium impurity in the crystal lattice of zirconium dioxide, is characterized by the lowest phase stability.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 124–129, November, 2014.
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Surzhikov, A.P., Frangylyan, T.S., Ghyngazov, S.A. et al. An Investigation of Phase Stability of a Composite ATZ Ceramic Material. Russ Phys J 57, 1593–1599 (2015). https://doi.org/10.1007/s11182-015-0423-y
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DOI: https://doi.org/10.1007/s11182-015-0423-y