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<p><b>Abstract</b>—Composites in the system of aluminum and zirconium oxides in which the matrix is corundum (Al<sub>2</sub>O<sub>3</sub>) or tetragonal zirconium dioxide stabilized by ytterbium cations [Zr–Yb]O<sub>2</sub> are obtained on the basis of nanosized powders synthesized using the hydrolytic sol-gel method. It is noted that, after sintering in an air environment, samples of composites of all compositions have a relative density of at least 98% of the theoretical density. It is shown that barothermal impact contributes to an increase in the absolute and relative density, shear modulus, Young’s modulus, and microhardness of samples of all compositions. It is established that the increase in physical and mechanical properties occurs regardless of the phase and chemical composition of the samples and is determined mainly by a more than twofold decrease in closed porosity as a result of barothermal impact.</p>

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Factor of Barothermal Influence on Ceramic Materials of Al2O3–ZrO2 System

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • L. I. Podzorova,
  • A. G. Padalko,
  • N. V. Grechishnikov,
  • A. A. Ilichyova,
  • G. P. Kochanov,
  • E. S. Morokov,
  • O. I. Penkova,
  • M. S. Pyrov

摘要

Abstract—Composites in the system of aluminum and zirconium oxides in which the matrix is corundum (Al2O3) or tetragonal zirconium dioxide stabilized by ytterbium cations [Zr–Yb]O2 are obtained on the basis of nanosized powders synthesized using the hydrolytic sol-gel method. It is noted that, after sintering in an air environment, samples of composites of all compositions have a relative density of at least 98% of the theoretical density. It is shown that barothermal impact contributes to an increase in the absolute and relative density, shear modulus, Young’s modulus, and microhardness of samples of all compositions. It is established that the increase in physical and mechanical properties occurs regardless of the phase and chemical composition of the samples and is determined mainly by a more than twofold decrease in closed porosity as a result of barothermal impact.