Physicochemical Properties of Sm2O3–ZrO2–HfO2 Ceramics for the Development of Promising Thermal Barrier Coatings
| Autor: | P. A. Stekhov, P. S. Marakhovskii, Valentina L. Stolyarova, N. I. Artemenko, O. N. Doronin, M. M. Bakradze |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Materials Science (miscellaneous) Atmospheric temperature range Thermal expansion Inorganic Chemistry Thermal barrier coating Thermal conductivity Chemical engineering visual_art visual_art.visual_art_medium Zirconium oxide Ceramic Physical and Theoretical Chemistry Temperature coefficient Samarium oxide |
| Zdroj: | Russian Journal of Inorganic Chemistry. 66:789-797 |
| ISSN: | 1531-8613 0036-0236 |
| Popis: | In continuation of our systematic study of the options of the development of high-performance thermal barrier coatings based on three-component ceramic materials comprising rare-earth oxides, we report on the effects of component concentrations on the thermophysical properties of ceramics based on the Sm2O3–ZrO2–HfO2 system. Samarium oxide is found to stabilize these ceramics when its concentration is higher than 22.5 mol % and zirconium oxide concentration is lower than 56.7 mol %. The temperature coefficient of linear expansion (TCLE) of the studied ceramic materials in the temperature range 20–1400°С can reach αL = (10.4 ± 0.6) × 10–6 with acceptable values of the thermal conductivity coefficient at a level of 0.56–0.84 W/(m K). |
| Databáze: | OpenAIRE |
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