High-temperature oxidation of ZrB2–SiC and ZrB2–SiC–ZrSi2 ceramics up to 1700°C in air
| Autor: | O. V. Koroteev, V. O. Lavrenko, Alla D. Panasyuk, O. M. Grigor’ev, V. A. Kotenko |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Borosilicate glass Metallurgy Metals and Alloys chemistry.chemical_element Condensed Matter Physics Cristobalite Oxygen Amorphous solid Corrosion Tetragonal crystal system Chemical engineering chemistry Mechanics of Materials visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Layer (electronics) |
| Zdroj: | Powder Metallurgy and Metal Ceramics. 51:217-221 |
| ISSN: | 1573-9066 1068-1302 |
| DOI: | 10.1007/s11106-012-9420-7 |
| Popis: | The high-temperature oxidation of ZrB2–SiC and ZrB2–SiC–ZrSi2 ceramics up to 1700°C in air has shown their high corrosion resistance. A five-stage nonisothermal oxidation mechanism is established for the samples when heated at a rate of 20°C/min: 1) oxygen adsorption–desorption; 2) formation of ZrO2 and B2O3 oxides; 3) formation of α-SiO2 cristobalite and ZrSiO4 zircon; 4) formation of amorphous SiO2; and 5) formation of upper protective borosilicate film with ZrSiO4 inclusions at less than 40 wt.% SiC. It is shown that small ZrSi2 admixtures ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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