Abstract
Silicon nitride-bonded silicon carbide ceramic tubes are used to provide indirect immersion heating in non-ferrous foundries. Samples of such tubes have been oxidized for varying lengths of time and then immersed in liquid aluminium. Long-term prior oxidation renders the ceramic susceptible to wetting by aluminium with subsequent degradation of mechanical properties. Samples not oxidized before immersion were stable in the liquid metal.
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Johnston, M.W., Little, J.A. Degradation of oxidized SiC-Si3N4 in molten aluminium. J Mater Sci 25, 5284–5290 (1990). https://doi.org/10.1007/BF00580162
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DOI: https://doi.org/10.1007/BF00580162