Structure formation regularity of multicomponent ceramics solid solutions based on carbides
The structure formation and mechanical properties of ceramic solid solutions (Hf,Zr,Ti)C, (Hf,Zr,Nb)C, stabilized by entropy, obtained from equimolar powder mixtures HfC-ZrC-TiC and HfC-ZrC-NbC by hot pressing in temperature interval from 1400 to 1900 °C were studied. It was found that monophase substitutional solid solutions (Hf,Zr,Ti)C and (Hf,Zr,Nb)C with an FCC lattice were formed at temperatures of 1700 °C and 1500 °C, respectively. It is shown that the formation of ceramic solid solutions (Hf,Zr,Ti)C and (Hf,Zr,Nb)C proceeds in several stages with formation of intermediate two-component ceramic solid solutions (Hf,Zr)C, (Zr,Nb)C, ( Ti,Zr)C and their subsequent dissolution. The obtained ceramic materials have the following physical and mechanical characteristics: E = (518±47) GPa, H = (34±4) GPa, K 1 C = (3.9±0.5) MPa∙m1/2 for (Hf,Zr,Ti)C, E = (513±46) GPa, H = (36±3) GPa, K 1 C = (4.2±0.5) MPa∙m1/2 for (Hf,Zr,Nb)C.
Keywords
transition metal carbides,
multi-component solid solution,
entropy stabilization,
structure formation,
hot pressingAuthors
| Wang D. | Institute of Strength Physics and Materials Science SB RAS | lanyuyan1993@gmail.com |
| Mirovoy Yu.A. | Institute of Strength Physics and Materials Science SB RAS | y.a.mirovoy@gmail.com |
| Burlachenko A.G. | Institute of Strength Physics and Materials Science SB RAS | aleksburlachenko@rambler.ru |
| Buyakov A.S. | Institute of Strength Physics and Materials Science SB RAS | alesbuyakov@gmail.com |
| Dedova E.S. | Institute of Strength Physics and Materials Science SB RAS | lsdedova@yandex.ru |
| Buyakova S.P. | Institute of Strength Physics and Materials Science SB RAS | sbuyakova@yandex.ru |
Всего: 6
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