The influence of ceria (CeO2: 0…3,56 wt. %) and sintering method (pressureless sintering in air, hot pressing in Ar) on the phase composition, microstructure, and properties of alumina-zirconia ceramics was investigated. The sintering method was found to determine the dual role of CeO2. Hot pressing facilitated the reduction of Ce4+ до Ce3+ and the formation of plate cerium hexaaluminate CeAl11O18, identified by XRD and EDS. Pressureless sintering led to the stabilization of the cubic ZrO2 phase (c-ZrO2). Hot pressing achieved high relative density (>99 %) and practically no open porosity, while pressureless sintering resulted in porosity up to 5 %. Hardness decreased with increasing CeO2 content for both methods. Fracture toughness in pressureless sintered ceramics was primarily controlled by porosity. In contrast, KIC increased with CeO2/CeAl11O18 content in hot-pressed materials, reaching a maximum of 7,5 ± 0,2 MPa·m1/2, demonstrating the effectiveness of CeAl11O18 as a toughening phase. The results indicate that hot pressing is the preferred method for producing CeAl11O18-toughened Al2O3–ZrO2 ceramics.
Nina Yu. Cherkasova – Cand. Sci. (Eng.), senior research scientist in the Research Laboratory of Physical and Chemical Technologies and Functional Materials, Novosibirsk State Technical University (NSTU), Novosibirsk, Russia
Ruslan I. Kuzmin – Cand. Sci. (Eng.), Associate Professor at the Department of Materials Science in Mechanical Engineering, Novosibirsk State Technical University (NSTU), Novosibirsk, Russia
Kristina A. Antropova – junior research scientist in the Research Laboratory of Physical and Chemical Technologies and Functional Materials, Novosibirsk State Technical University (NSTU), Novosibirsk, Russia
Dmitry V. Dick – junior research scientist, Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Natalya S. Aleksandrova – junior research scientist in the Research Laboratory of Physical and Chemical Technologies and Functional Materials, Novosibirsk State Technical University (NSTU), Novosibirsk, Russia
Igor E. Nasennik – junior research scientist in the Research Laboratory of Physical and Chemical Technologies and Functional Materials, Novosibirsk State Technical University (NSTU), Novosibirsk, Russia; Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Kol`tsovo, Novosibirsk Region, Russia
Roman R. Khabirov – junior research scientist in the Centre for Technological Excellence, Novosibirsk State Technical University (NSTU), Novosibirsk, Russia
1. Alves M. F. R. P., Levaro N. R., Faria M. S., et al. Direct ink writing of ATZ composites toughened with in-situ grown strontium hexaluminate platelets // Composites Part A: Applied Science and Manufacturing. 2025. V. 194. P. 108906.
2. Babaev A., Savchenko N. L., Kozlov V. N., et al. Performance of Y–TZP–Al2O3 composite ceramics in dry high-speed turning of thermally hardened steel 0.4 C-Cr (AISI 5135) // Metal Working and Material Science. 2025. V. 27, No. 2. P. 159 – 173.
3. Abbas H. A., Hammad F. F., Mohamed A. K., et al. Structural properties of zirconia doped with some oxides // Diffusion-Fundamentals. 2008. V. 8. P. 7.1 – 7.8.
4. Podzorova L. I., Shvorneva L. I., Il’Icheva A. A., et al. Microstructure and phase composition of ZrO2–CeO2–Al2O3 materials modified with MgO and Y2O3 // Inorganic Materials. 2013. V. 49, No. 4. P. 376 – 381.
5. Nettleship I., Stevens R. Tetragonal zirconia polycrystal (TZP) – a review // Internat High Technology Ceramics. 1987. V. 3. P. 1 – 32.
6. Theunissen G. S. A. M., Winnubst A. J. A., Burggraaf A. J. Effect of dopants on the sintering behaviour and stability of tetragonal zirconia ceramics // Journal of the European Ceramic Society. 1992. V. 9, No. 4. P. 251 – 263.
7. Промахов В., Буякова С., Кульков С. Структурные и фазовые превращения в керамике на основе ZrO2 при термических воздействиях // Фундаментальные проблемы современного материаловедения. 2011. Т. 8, № 4. С. 11 – 16.
8. Liu L., Maeda K., Onda T., et al. Microstructure and improved mechanical properties of Al2O3/Ba–?–Al2O3/ZrO2 composites with YSZ addition // Journal of the European Ceramic Society. Elsevier, 2018. V. 38, No. 15. P. 5113 – 5121.
9. Li J., Medina E. A., Stalick J. K., et al. Structural studies of CaAl12O19, SrAl12O19, La2/3+? Al12–?O19, and CaAl10NiTiO19 with the hibonite structure; indications of an unusual type of ferroelectricity // Zeitschrift f?r Naturforschung B. 2016. V. 71, No. 5. P. 475 – 484.
10. Iyi N., Takekawa S., Kimura S. Crystal chemistry of hexaaluminates: ?-alumina and magnetoplumbite structures // Journal of Solid State Chemistry. Academic Press, 1989. V. 83, No. 1. P. 8 – 19.
11. Akin I., Yilmaz E., Sahin F., et al. Effect of CeO2 addition on densification and microstructure of Al2O3–YSZ composites // Ceramics International. 2011. V. 37, No. 8. P. 3273 – 3280.
12. Shi S., Cho S., Goto T., et al. Role of CeAl11O18 in reinforcing Al2O3 /Ti composites by adding CeO2 // International Journal of Applied Ceramic Technology. 2021. V. 18, No.1. P. 170 – 181.
13. Liu M., Wang Z., Luan X., et al. Effects of CeO2 and Y2O3 on the interfacial diffusion of Ti/Al2O3 composites // Journal of Alloys and Compounds. 2016. V. 656. P. 929 – 935.
14. Niihara K., Morena R., Hasselman D. P. H. Evaluation of KIc of brittle solids by the indentation method with low crack-to-indent ratios // Journal of Materials Science Letters. Kluwer Academic Publishers, 1982. V. 1, No. 1. P. 13 – 16.
15. Zhang F., Chen C. H., Hanson J. C., et al. Phases in ceria–zirconia binary oxide (1?x)CeO2–x ZrO2 Nanoparticles: The effect of particle size // Journal of the American Ceramic Society. 2006. V. 89, No. 3. P. 1028 – 1036.
16. Agarkov D. A., Borik M. A., Korableva G. M., et al. Effect of ceria on the properties of yttria-stabilized zirconia-based electrolytic membranes // Journal of Solid State Electrochemistry. 2024. V. 28, No. 6. P. 1901 – 1908.
17. Ban S., Yasuoka Y., Sugiyama T., et al. Translucent and highly toughened zirconia suitable for dental restorations // Prosthesis. 2023. V. 5, No. 1. P. 60 – 72.
18. Tian M., Wang X. D., Zhang T. Hexaaluminates: a review of the structure, synthesis and catalytic performance // Catalysis Science & Technology. 2016. V. 6, No. 7. P. 1984 – 2004.
19. Negahdari Z., Willert-Porada M., Pfeiffer C. Mechanical properties of dense to porous alumina/lanthanum hexaaluminate composite ceramics // Materials Science and Engineering: A. 2010. V. 527, No. 12. P. 3005 – 3009.
20. Antropova K., Cherkasova N., Dik D., et al. Comparison of hot-pressed alumina-zirconia ceramics toughened with lanthanum and cerium hexaaluminates // Materials Characterization. 2025. V. 222. P. 114805.
21. Cherkasova N., Antropova K., Kuzmin R., et al. Features of calcium hexaaluminate formation in alumina-zirconia ceramics // Chimica Techno Acta. 2023. V. 10, No. 3. P. 202310317.
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