Sintering and Properties of β'-Sialon with a Nitrogen-Rich Y2O3 Sintering Aid |
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Authors: | Siddhartha Bandyopadhyay Joydeb Mukerji Kalpana Roychoudhury |
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Affiliation: | Central Glass and Ceramic Research Institute, Jadavpur, Calcutta-32, India |
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Abstract: | The synthesis of dense sintered sialon with external additives selected from the system Y2O3–AIN–SiO2 is reported. The highest density (3.21 g/cm3) was achieved at 1750°C at 90 min of sintering with 5 wt% additive. The degree of sialon substitution increased with the amount of liquid; the YSiO2N crystalline phase formed concurrently. Strength degradation occurred above 1000°C. The fracture toughness of the material sintered with a lower amount of sintering aid remained relatively unchanged to 1200°C. The material with more additive exhibited decreased toughness above 1000°C. |
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Keywords: | sialons sintering yttria nitrogen synthesis |
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