Mechanism of High-Temperature Oxidation of ZrB2-Based Composite Ceramics in the ZrB2–SiC–AlN System
| Autor: | Irina A. Podchernyaeva, O. N. Grigoriev, I. P. Neshpor, D. V. Yurechko, Alla D. Panasyuk |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Composite number Metals and Alloys Oxide Mullite 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences chemistry.chemical_compound chemistry Mechanics of Materials Phase (matter) visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Grain boundary Ceramic Composite material 0210 nano-technology Layer (electronics) Solid solution |
| Zdroj: | Powder Metallurgy and Metal Ceramics. 57:71-74 |
| ISSN: | 1573-9066 1068-1302 |
| DOI: | 10.1007/s11106-018-9956-2 |
| Popis: | The paper examines the oxidation of the ZrB2–SiC–AlN composite at high temperatures (1550–1700°C) and focuses on the structure and phase composition of the starting ceramic material and scale layer. The oxide layer develops in two stages. At the low-temperature stage (1170–1250°C), an intermediate layer forms, consisting of ZrB2 and involving solid solutions in the AlON–SiC/SiO2 system. The high-temperature stage (1250–1350°C) gives rise to the main protective layer consisting of xAl2O3–ySiO2 mullite solid solutions and colonies of zirconium oxide crystals, located at the grain boundaries of the mullite phase. The resultant oxide layer is an effective potential barrier to the diffusion of oxygen into the sample. |
| Databáze: | OpenAIRE |
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