Effect of heating rate on the shrinkage and microstructure of liquid phase sintered SiC ceramics
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Ceramics International
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This paper describes a study of shrinkage behavior in the liquid phase sintering of silicon carbide, SiC, using eutectic mixtures of Al2O3+Dy2O3 and Al2O3+Yb2O3 as liquid-forming additives. A volume fraction 10% of these mixtures was added to the SiC and homogenized in an attrition mill. Sintering was performed in a horizontal dilatometer at 1800 °C for 60 min, applying heating rates of 10, 20 and 30 °C/min. The results indicate that these heating rates affected neither shrinkage nor microstructure, from the standpoint of the complete sintering cycle. However, significant differences occurred during the non-isothermal sintering stage, leading to very different shrinkage results as a function of the heating rate. Higher heating rates produced lower shrinkage, and the work of final shrinkage occurred during the isothermal stage.
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RIBEIRO, S.; GENOVA, L.A.; RIBEIRO, G.C.; OLIVEIRA, M.R.; BRESSIANI, A.H.A. Effect of heating rate on the shrinkage and microstructure of liquid phase sintered SiC ceramics. Ceramics International, v. 42, n. 15, p. 17398-17404, 2016. DOI: 10.1016/j.ceramint.2016.08.039. Disponível em: http://repositorio.ipen.br/handle/123456789/27200. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.