Vavrukh V. The effect of alloying on the stabilization of the phase state and properties of ZrO2 based oxide ceramics

Українська версія

Thesis for the degree of Doctor of Philosophy (PhD)

State registration number

0825U000660

Applicant for

Specialization

  • 132 - Матеріалознавство

Specialized Academic Board

PhD 7667

Lviv Polytechnic National University

Essay

Vavrukh V.I. The effect of alloying on the stabilization of the phase state and properties of ZrO2 based oxide ceramics. Thesis for the Doctor of Philosophy degree in specialty 132 – Materials Science, field of knowledge 13 – Mechanical Engineering, Lviv Polytechnic National University, Ministry of Education and Science of Ukraine, Lviv, 2024. PhD thesis is dedicated to solving the relevant scientific and technical tasks of experimental research of the influence of alloying on the phase composition, microstructure, and fracture surface morphology of zirconia ceramics sintered at different temperatures to achieve the required mechanical properties, in particular microhardness, strength, and fracture toughness. PhD thesis also covers predicting the mechanical properties of these ceramics using machine learning algorithms, which will significantly save material, time, and financial resources in manufacturing ceramic products. The aim of the PhD thesis is to evaluate the influence of the chemical and phase compositions, sintering temperature, microstructure, and fracture surface morphology on the microhardness, strength, and fracture toughness of zirconia ceramics to ensure the required functional and operational properties. The following tasks were completed in the work: - the effect of the chemical and phase composition, microstructure, and sintering temperature of zirconia ceramics on mechanical properties (microhardness, flexural strength, and fracture toughness) was evaluated; - the choice of effectively using the existing empirical dependences of fracture toughness determination by the Vickers indentation method was made; - the relationship between fracture toughness and fracture surface morphology was investigated to identify a high-energy micromechanism of fracture; - the possibility of reducing the cost of zirconia ceramics by alloying Al2O3, CoO, CeO2, Fe2O3, and MgO instead of Y2O3 to stabilize the tetragonal phase of ZrO2 and maintain or increase the level of mechanical properties was evaluated; - prediction of mechanical properties (microhardness, strength, and fracture toughness) of zirconia ceramics of different alloying systems was carried out using machine learning methods. The research object is zirconia ceramics of different alloying systems. The research subject is the influence of alloying on the phase composition, microstructure, and properties of zirconia ceramics sintered at different temperatures. Keywords: ceramics, zirconium oxide, yttrium oxide, aluminum oxide, complex alloying, oxides, sintering temperature, phase composition, phase formation, phase stabilization, crystal lattice, microstructure, strength, microhardness, fracture toughness, crack growth resistance, pores, voids, fractography, modeling, prediction.

Research papers

1. Kulyk, V., Duriagina, Z., Kostryzhev, A., Vasyliv, B., Vavrukh, V., & Marenych, O. (2022). The effect of yttria content on microstructure, strength, and fracture behavior of yttria-stabilized zirconia. Materials, 15(15), 5212. https://doi.org/10.3390/ma15155212

2. Kulyk, V., Duriagina, Z., Vasyliv, B., Vavrukh, V., Kovbasiuk, T., Lyutyy, P., & Vira, V. (2022). The effect of sintering temperature on the phase composition, microstructure, and mechanical properties of yttria-stabilized zirconia. Materials, 15(8), 2707. https://doi.org/10.3390/ma15082707

3. Kulyk, V. V., Duriagina, Z. A., Vasyliv, B. D., Vavrukh, V. I., Lyutyy, P. Y., Kovbasyuk, T. M., & Holovchuk, M. Y. (2021). Effects of yttria content and sintering temperature on the microstructure and tendency to brittle fracture of yttria-stabilized zirconia. Archives of Materials Science and Engineering, 109(2), 65–79. https://doi.org/10.5604/01.3001.0015.2625

4. Kulyk, V., Izonin, I., Vavrukh, V., Tkachenko, R., Duriagina, Z., Vasyliv, B., & Kováčová, M. (2023). Prediction of hardness, flexural strength, and fracture toughness of ZrO2 based ceramics using ensemble learning algorithms. Acta Metallurgica Slovaca, 29(2), 93-103. https://doi.org/10.36547/ams.29.2.1819

5. Kulyk, V., Vasyliv, B., Duriagina, Z., Lyutyy, P., Vavrukh, V., & Kostryzhev, A. (2024). The effect of sintering temperature on phase-related peculiarities of the microstructure, flexural strength, and fracture toughness of fine-grained ZrO2–Y2O3–Al2O3–CoO–CeO2–Fe2O3 ceramics. Crystals, 14(2), 175. https://doi.org/10.3390/cryst14020175

6. Kulyk, V. V., Duriagina, Z. A., Vasyliv, B. D., Lyutyy, P. Ya., Klimczyk, P., Vavrukh, V. I., Efremenko, V. G., Kostryzhev, A., Trostianchyn, A. M., & Kovbasiuk, T. M. (2024). The effect of sintering modes on the crystal lattice parameters and the morphology of the ZrO₂–nY₂O₃ (n = 3–8 mol%) ceramic microstructure components. Archives of Materials Science and Engineering, 128(1), 5–22. https://doi.org/10.5604/01.3001.0054.8015

7. Vavrukh, V. (2022). Effects of the yttria content and sintering temperature on the phase evolution in yttria-stabilized zirconia. Ukrainian Journal of Mechanical Engineering and Materials Science, 8(1), 12–19. https://doi.org/10.23939/ujmems2022.01.012

8. Vavrukh, V., Klimczyk, P., Priakhin, V., Petryk, V., & Momot, K. (2023). Applicability assessment of the Vickers indentation for determining the fracture toughness of yttria-stabilized zirconia. Ukrainian Journal of Mechanical Engineering and Materials Science, 9(3), 48–59. https://doi.org/10.23939/ujmems2023.03.048

Kulyk, V., Duriagina, Z., Vasyliv, B., Kovbasiuk, T., Lyutyy, P., Vira, V., & Vavrukh, V. (2022). Effect of sintering temperature on crack growth resistance characteristics of yttria-stabilized zirconia. In Proceedings of the International Conference on Oxide Materials for Electronic Engineering (OMEE 2021), Acta Physica Polonica A, 141(4), 323–327. https://doi.org/10.12693/APhysPolA.141.323

10. Kulyk, V. V., Vasyliv, B., Duriagina, Z. A., Vavrukh, V. I., Lyutyy, P. Ya., Kovbasiuk, T. M., Tepla, T. L., & Holovchuk, M. Ya. (2023). Estimation of the role of nanosized stabilizing powders in gaining high-level crack growth resistance of partially stabilized zirconia. In O. Fesenko & L. Yatsenko (Eds.), Nanomaterials and Nanocomposites, Nanostructure Surfaces, and Their Applications (NANO2021), Springer Proceedings in Physics, Springer, Cham, vol. 279, pp. 311–330. https://doi.org/10.1007/978-3-031-18096-5_18

11. Kulyk, V. V., Duriagina, Z. A., Vasyliv, B. D., Vavrukh, V. I., Kovbasiuk, T. M., Lyutyy, P. Ya., & Vira, V. V. (2023). The effect of rare-earth metal oxide additives on crack growth resistance of fine-grained partially stabilized zirconia. In O. Fesenko & L. Yatsenko (Eds.), Nanoelectronics, Nanooptics, Nanochemistry and Nanobiotechnology, and Their Applications (NANO 2022), Springer Proceedings in Physics, Springer, Cham, vol. 297, pp. 263–279. https://doi.org/10.1007/978-3-031-42708-4_17

12. Kulyk, V. V., Duriagina, Z. A., Vasyliv, B. D., Vavrukh, V. I., Lyutyy, P. Y., Kovbasiuk, T. M., Vira, V. V., & Vynar, V. A. (2023). Study of the effects of MgO additive and sintering temperature on mechanical behavior of fine-grained ZrO2–MgO ceramics. In O. Fesenko & L. Yatsenko (Eds.), Nanostructured Surfaces, Nanocomposites and Nanomaterials, and Their Applications (NANO2022), Springer Proceedings in Physics, Springer, Cham, vol. 296, pp. 227–244. https://doi.org/10.1007/978-3-031-42704-6_17

13. Vavrukh, V., Hebda, M., & Lyutyy, P. (2022). Phase balance in yttria-stabilized zirconia depending on the content of the stabilizing additive and sintering temperature. In Proceedings of the 2nd International Conference on Environment, Technology and Management (ICETEM), 13-15 October 2022, Niğde, Turkey,131

14. Vavrukh, V.I., Kulyk, V.V., Duriagina, Z.A., Vasyliv, B.D. (2022) Fracture toughness of zirconia ceramic doped with 3-8 mol% Y2O3. I International Scientific and Practical Conference “Development and design of modern materials and products”, 27-28 October, Dnipro, Ukraine, 11

15. Vavrukh, V. I. (2023). Effect of sintering temperature on the phase composition and properties of zirconia ceramics doped with Y, Co, Ce, Fe oxides. International Conference “Materials Innovations in Surface Engineering” (MISE2023), 29-31 October, University of Queensland, Brisbane, Australia, 25.

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