Abstract
Using a pure α–SiC starting powder and an oxynitride glass composition from the Y–Mg–Si–Al–O–N system as a sintering additive, a powder mixture was hot-pressed at 1850 °C for 1 h under a pressure of 20 MPa and further annealed at 2000 °C for 4 h in a nitrogen atmosphere of 0.1 MPa. High-resolution electron microscopy and x-ray diffraction studies confirmed that a small amount of β–SiC was observed in the liquid-phase-sintered α–SiC with this oxynitride glass, indicating stability of β–SiC even at high annealing temperature, due to the nitrogen-containing liquid phase.
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Zhan, GD., Mitomo, M., Kim, YW. et al. Transmission electron microscopy observation in a liquid-phase-sintered SiC with oxynitride glass. Journal of Materials Research 16, 2189–2191 (2001). https://doi.org/10.1557/JMR.2001.0299
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DOI: https://doi.org/10.1557/JMR.2001.0299