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Synthesis of Composite Materials in the System Cr–Ti–B by the Self-Propagating High-Temperature Synthesis from Mixtures CaCrO4/TiO2/Al/B

  • Inorganic Synthesis and Industrial Inorganic Chemistry
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Abstract

Using the method of self-propagating high-temperature synthesis (SHS metallurgy), cast composite materials were produced in the Cr–Ti–B system. The experiments were carried out in universal SHS reactors with an initial argon pressure of Рin = 5 MPa. Mixtures of CaCrO4, TiO2, Al, and B powders were used as batch. It was shown that by varying the mass ratio α of CaCrO4/2Al/2B and 3TiO2/4Al/6B mixtures in a batch, it is possible to significantly affect the synthesis patterns, phase composition, and microstructure of the target products. The initial mixtures are capable of burning in the range of α 0–20%. The phase separation limit occurs at α = 15%. The introduction of a highly exothermic CaO2 + Al additive into the mixture made it possible to expand the phase separation limit to α = 20%. As α increases, the amount of titanium boride in the final product increases. The resulting composite material consists of titanium-chromium boride distributed in a matrix of chromium boride. The synthesized materials were characterized by X-ray and local microstructural analysis. The structural phase states of the target products produced under various conditions were studied.

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Correspondence to P. A. Miloserdov.

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ACKNOWLEDGMENTS

To perform the research, the equipment of the ISMAN Distributed Center for Collective Use was involved.

FUNDING

This work was financially supported by the grant of the Russian Foundation for Basic Research no. 18-08-00804.

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The authors declare that they have no conflict of interest.

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Miloserdov, P.A., Gorshkov, V.A., Sachkova, N.V. et al. Synthesis of Composite Materials in the System Cr–Ti–B by the Self-Propagating High-Temperature Synthesis from Mixtures CaCrO4/TiO2/Al/B. Russ J Appl Chem 93, 362–368 (2020). https://doi.org/10.1134/S1070427220030076

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