Effect of technological parameters on densification of reaction bonded Si/SiC ceramics
| Autor: | M.S. Alshahrani, D.V. Solovei, M.O. Stepkin, M. V. Kiyashko, P. S. Grinchuk, M. Yu. Liakh, V.V. Toropov, A. V. Akulich, M.D. Shashkov, Hatem Abuhimd, A. A. Khort |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Carbonization Composite number Sintering 02 engineering and technology Molding (process) 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry visual_art Materials Chemistry Ceramics and Composites Silicon carbide visual_art.visual_art_medium Pyrolytic carbon Ceramic Composite material 0210 nano-technology Porosity |
| Zdroj: | Journal of the European Ceramic Society. 38:4815-4823 |
| ISSN: | 0955-2219 |
| Popis: | Si/SiC composite ceramics was produced by reaction sintering method in process of molten silicon infiltration into porous C/SiC preform fabricated by powder injection molding followed by impregnation with phenolic resin and carbonization. To optimize the ceramics densification process, effect of slurry composition, debinding conditions and the key parameters of all technological stages on the Si/SiC composite characteristics was studied. At the stage of molding the value of solid loading 87.5% was achieved using bimodal SiC powder and paraffin-based binder. It was found that the optimal conditions of fast thermal debinding correspond to the heating rate of 10 °C/min in air. The porous C/SiC ceramic preform carbonized at 1200 °C contained 4% of pyrolytic carbon and ∼25% of open pores. The bulk density of Si/SiC ceramics reached 3.04 g/cm3, silicon carbide content was 83–85 wt.% and residual porosity did not exceed 2%. |
| Databáze: | OpenAIRE |
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