Structure Formation in Equimolar Mixture of HfC–ZrC–TiC–NbC Carbides

Structure formation during hot pressing of an equimolar powder mixture HfC–ZrC–TiC–NbC in the temperature range from 1400 to 1900°C is investigated. It is found that a monophase substitutional solid solution (Hf, Zr, Ti, Nb)C based on hafnium carbide forms at a temperature of 1700°C. It is shown tha...

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Bibliographic Details
Published in:Russian physics journal 2021-11, Vol.64 (7), p.1191-1197
Main Authors: Wang, D., Mirovoy, Yu. A., Burlachenko, A. G., Buyakov, A. S., Dedova, E. S., Buyakova, S. P.
Format: Article
Language:English
Subjects:
Carbides
Ceramics
Condensed Matter Physics
Hadrons
Hafnium carbide
Heavy Ions
Hot pressing
Hydrofluorocarbons
Lasers
Mathematical and Computational Physics
Mechanical properties
Niobium carbide
Nuclear Physics
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Powders
Solid solutions
Substitutional solid solutions
Theoretical
Titanium carbide
Zirconium carbide
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Summary:Structure formation during hot pressing of an equimolar powder mixture HfC–ZrC–TiC–NbC in the temperature range from 1400 to 1900°C is investigated. It is found that a monophase substitutional solid solution (Hf, Zr, Ti, Nb)C based on hafnium carbide forms at a temperature of 1700°C. It is shown that the formation of the ceramic solid solution (Hf, Zr, Ti, Nb)C proceeded in many stages with the formation of intermediate two- and three-component ceramic solid solutions (Hf, Zr)C, (Nb, Zr)C, and (Hf, Zr, Ti)C and their subsequent dissolution. The resulting ceramic multicomponent substitutional solid solution (Hf, Zr, Ti, Nb)C has improved mechanical properties compared to similar properties of initial carbides: E = (616 ± 77) GPa, H = (36 ± 8) GPa, and K1C = ( 3.4 ± 0.5) MPa ∙ m 1/2 .
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-021-02443-x