Study of the effect of variation of thermal annealing conditions on the structural ordering and phase formation processes in ZrO₂ – Al₂O₃ ceramicss

D.B. Borgekov; A.L. Kozlovskiy; D.I. Shlimas; R.I. Shakirziyanov; A.I. Popov; M. Konuhova

doi:10.31643/2026/6445.05

Authors

D.B. Borgekov Institute of Nuclear Physics
A.L. Kozlovskiy Institute of Nuclear Physics
D.I. Shlimas L.N. Gumilyov Eurasian National University
R.I. Shakirziyanov L.N. Gumilyov Eurasian National University
A.I. Popov Institute of Solid State Physics University of Latvia
M. Konuhova Institute of Solid State Physics University of Latvia

DOI:

https://doi.org/10.31643/2026/6445.05

Keywords:

ZrO2 – Al2O3 ceramics; thermal annealing; phase transformations; strengthening; resistance to thermal influences

Abstract

Interest in composite refractory ZrO₂– Al₂O₃ ceramics is due to the great prospects for their use in extreme conditions (radiation exposure, thermal cycling, exposure to aggressive environments) due to the high resistance to external influences of these ceramics. Moreover, the features of high resistance to external influences for this type of ceramics are due to their structural features and phase composition, which are controlled by the synthesis method and its conditions. This paper presents the results of studying the influence of variations in the annealing temperature of ZrO₂– Al₂O₃ ceramics obtained by solid-phase synthesis, as well as establishing the effect of variations in the phase composition on strengthening and resistance to thermal cycling. In the course of the research, using the X-ray phase analysis method, it was found that at temperatures above 1200 °C, the formation of an impurity substitution phase of the AlZrO₂ type is observed, the formation of which leads to strengthening and increased resistance to external influences. For ZrO₂– Al₂O₃ ceramic samples, in which the AlZrO₂ phase content was about 15-20 % (samples obtained at annealing temperatures of 1400 – 1500 °C), the change in strength characteristics after 5 successive cycles was less than 3 %, which is more than 9 times lower than the similar change for two-phase samples obtained at an annealing temperature of 1000 °C.

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Author Biographies

D.B. Borgekov, Institute of Nuclear Physics

PhD, The Institute of Nuclear Physics, 050032, Almaty, Kazakhstan. ORCID ID: https://orcid.org/0000-0002-9727-0511

A.L. Kozlovskiy, Institute of Nuclear Physics

PhD, The Institute of Nuclear Physics, 050032, Almaty, Kazakhstan. ORCID ID: https://orcid.org/0000-0001-8832-7443

D.I. Shlimas, L.N. Gumilyov Eurasian National University

PhD, L.N. Gumilyov Eurasian National University, 010008, Astana, Kazakhstan. ORCID ID: https://orcid.org/0000-0003-2454-7177

R.I. Shakirziyanov, L.N. Gumilyov Eurasian National University

PhD, L.N. Gumilyov Eurasian National University, 010008, Astana, Kazakhstan. ORCID ID: https://orcid.org/0000-0001-9908-3034

A.I. Popov, Institute of Solid State Physics University of Latvia

Dr., Institute of Solid State Physics University of Latvia, LV-1063, 8 Kengaraga Str, Riga, Latvia. ORCID ID: https://orcid.org/0000-0003-2795-9361

M. Konuhova, Institute of Solid State Physics University of Latvia

PhD, Institute of Solid State Physics University of Latvia, LV-1063, 8 Kengaraga Str, Riga, Latvia. ORCID ID: https://orcid.org/0000-0003-0743-5915

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