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<p>The process of formation of solid solutions of the (Ti, Zr, Hf)B<sub>2</sub>, (Zr, Hf, Nb)B<sub>2</sub>, and (Zr, Hf, Ta)B<sub>2</sub> compositions was investigated. The heterophase microstructure consisting of a&#xa0;solid solution and inclusions based on HfB<sub>2</sub> and TaB<sub>2</sub> is formed. It is possible to increase diffusion processes and, as a&#xa0;result, increase the elements’ solubility by increasing the densification temperature. The highest solubility is observed in the case of arc melting, when all components are in a&#xa0;liquid phase. However, for the (Zr, Hf, Ta)B<sub>2</sub> composition, the TaB<sub>2</sub> individual inclusions are formed, since the energy of TaB<sub>2</sub> formation significantly differs from the energy of other components.</p>

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Conditions for the formation of a solid solution in the (Ti, Zr, Hf)B2, (Zr, Hf, Nb)B2, and (Zr, Hf, Ta)B2 systems

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • D. V. Vedel,
  • P. V. Mazur,
  • O. M. Grigoriev,
  • I. V. Kozak,
  • L. M. Melakh,
  • M. P. Naumenko,
  • M. V. Karpets,
  • M. A Skoryk,
  • R. V. Kozin,
  • A. V. Zavdoveev

摘要

The process of formation of solid solutions of the (Ti, Zr, Hf)B2, (Zr, Hf, Nb)B2, and (Zr, Hf, Ta)B2 compositions was investigated. The heterophase microstructure consisting of a solid solution and inclusions based on HfB2 and TaB2 is formed. It is possible to increase diffusion processes and, as a result, increase the elements’ solubility by increasing the densification temperature. The highest solubility is observed in the case of arc melting, when all components are in a liquid phase. However, for the (Zr, Hf, Ta)B2 composition, the TaB2 individual inclusions are formed, since the energy of TaB2 formation significantly differs from the energy of other components.