Synthesis of Zirconium diboride based ultra high temperature ceramics via preceramic route
| Autor: | B. S. Nithin Chandran, P.V. Prabhakaran, Deepa Devapal |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Scanning electron microscope Infrared spectroscopy chemistry.chemical_element 02 engineering and technology Boron carbide engineering.material 01 natural sciences chemistry.chemical_compound 0103 physical sciences Materials Chemistry Ceramic 010302 applied physics Zirconium diboride Zirconium Process Chemistry and Technology 021001 nanoscience & nanotechnology Microstructure Ultra-high-temperature ceramics Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Chemical engineering visual_art Ceramics and Composites visual_art.visual_art_medium engineering 0210 nano-technology |
| Zdroj: | Ceramics International. 45:25092-25096 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.05.253 |
| Popis: | The present work focuses on the synthesis of ZrB2 based ceramics via a preceramic route, which involves the preparation of ceramic slurry with Zirconium silicate or zircon (ZrSiO4), boron carbide (B4C), phenolic resin and ethanol as the raw materials in stoichiometric amounts. The slurry is cured and then pyrolysed at 1500 °C and 1650 °C in argon atmosphere under a well-defined heating schedule. The heat treated samples were analysed by XRD (X-Ray Diffraction), Fourier Transform Infrared (FT-IR) spectroscopy, particle shape and size analyzer and Scanning Electron Microscopy (SEM). Complete conversion of the reactants to ZrB2–SiC occurred at 1650 °C, while the XRD and IR spectra of sample pyrolysed at 1500 °C indicated the presence of zircon along with silica. SEM images of ZrB2–SiC powder showed coral like microstructure with an average particle size of 6.6 μm. |
| Databáze: | OpenAIRE |
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