Phase transformation in equimolecular mixture of HfC-ZrC-TiC-NbC carbides
The phase evolution during sintering under pressure in the temperature range from 1400 to 1900 oC of equimolar powder mixture NbC-HfC-TiC-ZrC was investigated. It is established that monophase solid solution of (Hf, Zr, Ti, Nb)C substitution was formed at 1700 oC. From these experiments it was determined that HfC tends to act as the host material. It is shown that formation of (Hf, Zr, Ti, Nb)C solid solution proceeded multistage with formation of intermediate two- and three-component ceramic (Hf, Zr)C, (Nb, Zr)C, (Hf, Zr, Ti)C solid solutions and their subsequent dissolution. The (Hf, Zr, Ti, Nb)C solid solutions has improved mechanical properties as compared to similar properties of the original carbides: E = (616±77) GPa, H = (36±8) GPa, K1C = (3.4±0.5) MPa∙m1/2.
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Keywords
transition metal carbides, solid solution, entropy stabilization, structure formation, pressure sinteringAuthors
| Name | Organization | |
| Wang D. | Institute of Strength Physics and Materials Science of SB RAS | lanyuyan1993@gmail.com |
| Mirovoy Yu.A. | Institute of Strength Physics and Materials Science of SB RAS | y.a.mirovoy@gmail.com |
| Burlachenko A.G. | Institute of Strength Physics and Materials Science of SB RAS | aleksburlachenko@rambler.ru |
| Buyakov A.S. | Institute of Strength Physics and Materials Science of SB RAS | alesbuyakov@gmail.com |
| Dedova E.S. | Institute of Strength Physics and Materials Science of SB RAS | lsdedova@yandex.ru |
| Buyakova S.P. | Institute of Strength Physics and Materials Science of SB RAS | sbuyakova@ispms.tsc.ru |
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