Phase interaction between ZrB2–SiC composite ceramics and oxide melts
| Autor: | Alla D. Panasyuk, T. V. Dubovik, O. N. Grigor'ev, A. V. Koroteev |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Dross Metallurgy Composite number Metals and Alloys Oxide Condensed Matter Physics Corrosion chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Silicon carbide Surface layer Wetting Ceramic |
| Zdroj: | Powder Metallurgy and Metal Ceramics. 51:584-588 |
| ISSN: | 1573-9066 1068-1302 |
| Popis: | The paper studies the mechanism of interaction between ZrB2–ZrSi2–SiC composites and dross-type oxide melts formed during the combustion of low-reactive carbons containing oxide rocks up to 30–40 vol.%. It is established that silicon carbide from the surface layer of the composite interacts with iron oxides to form spherical precipitates of the FeSi x phase at 1350–1550°C in the wetting process and in contact with the dross during 10–50 h. At the composite–dross interface, a thin (~7.5–30.0 μm) layer of ZrO2 and SiO2 oxides forms (depending on the amount of SiC and ZrSi2) and serves as a protective film preventing the composite ceramics from corrosion in the oxide melts. The optimum composition of the ZrB2–ZrSi2–SiC ceramics that can be used as corrosion-resistant in oxide melts is determined. |
| Databáze: | OpenAIRE |
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