Abstract
Five silicon nitride ceramics with various additives were evaluated for their oxidation resistance at 1300 ° C in flowing dry and wet air. In a dry atmosphere, the oxidation of all types of Si3N4 except one proceeded in two stages with different reaction rates nearly following the parabolic law. In a wet atmosphere, all types showed a linear relationship between weight gain by oxidation and water varpour content. The water vapour in the atmosphere slightly accelerated the oxidation. The influence of oxidation on room-temperature strength was complex, but there was no observed distinguishable difference of the effect on the flexural strength between dry and wet oxidation.
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Maeda, M., Nakamura, K. & Yamada, M. Oxidation resistance of silicon nitride ceramics with various additives. J Mater Sci 25, 3790–3794 (1990). https://doi.org/10.1007/BF00575420
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DOI: https://doi.org/10.1007/BF00575420