Abstract
α-sialon starting compositions withm=1 andn=1.7 have been densified by either hot-pressing or pressureless sintering using Y2O3 and Ln2O3 additions where Ln is neodymium, samarium, dysprosium or ytterbium. The resulting materials have been heat treated at 1450°C to crystallize the grain-boundary liquid into crystalline oxynitride phases. The effect of sintering additive on the design of final properties has been studied and Dy2O3 was found to be the best sintering additive to obtain desirable properties for α-sialon and also α-β sialon materials.
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Mandal, H., Camuscu, N. & Thompson, D.P. Comparison of the effectiveness of rare-earth sintering additives on the high-temperature stability of α-sialon ceramics. J Mater Sci 30, 5901–5909 (1995). https://doi.org/10.1007/BF01151503
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DOI: https://doi.org/10.1007/BF01151503