| Autor: |
Dedova, E. S., Burlachenko, A. G., Mirovoy, Y. A., Buyakov, A. S., Buyakova, S. P. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2019, Vol. 2167 Issue 1, p020067-1-020067-5, 5p, 3 Diagrams, 1 Chart, 3 Graphs |
| Abstrakt: |
The structure and defects self-healing mechanism of ceramic composite materials (ZrB2-ZrC-SiC)-ZrO2 depending on the volume fraction of zirconia (0, 5, 10, 15 vol.%) werestudied. Increasing of ZrO2 content led to higher composites compaction obtained by sintering under a pressure of 30 MPa at a temperature of 1900 °C, and to decreasing of the ceramic particles average size. Annealing in the air at 1200 °C led to (ZrB2-ZrC-SiC)-ZrO2 composites oxidation with the formation of an oxide layer consisting of a porous ZrO2 matrix impregnated with borosilicate (B2O3 + SiO2) glass. The thickness of the oxide layer increased with the increasing of zirconia volume fraction. The percentage of defects self-healing after °C led to the complete defects healing with ZrO2 content above 10 vol. %. The effect of temperature of 1600 °C on ceramic composites led to the complete defects healing, regardless of the ZrO2 content. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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