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Microhardness and Thermal Expansion of Some Binary and Ternary Boride Phases in the Ca–Ir–B System

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Inorganic Materials Aims and scope

Abstract—

We have studied the thermal expansion of CaIr4B4, IrB1.1, and CaB6. The results demonstrate that the crystal lattices of these phases expand linearly with temperature and that their thermal expansion coefficients lie in the range (5–10) × 10–6 K–1. We have determined the average microhardness of the CaIr4B4, IrB1.1, and CaB6 phases. The average microhardness of the CaIr4B4 phase is ~15 GPa, which is a factor of 3 lower than that of the CaB6 phase.

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ACKNOWLEDGMENTS

We are grateful to A.V. Ukhina, T.A. Borisenko, and Ya.A. Nikiforov.

Funding

This work was supported by the Russian Science Foundation, grant no. 22-79-00019.

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Authors and Affiliations

  1. Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia

    V. V. Lozanov, A. V. Utkin & N. I. Baklanova

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  1. V. V. Lozanov
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  2. A. V. Utkin
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  3. N. I. Baklanova
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Correspondence to V. V. Lozanov.

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Lozanov, V.V., Utkin, A.V. & Baklanova, N.I. Microhardness and Thermal Expansion of Some Binary and Ternary Boride Phases in the Ca–Ir–B System. Inorg Mater 59, 696–702 (2023). https://doi.org/10.1134/S0020168523070105

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