Effect of temperature and heating rate on the sintering performance of SiC-Al2O3-Dy2O3 and SiC-Al2O3-Yb2O3 systems
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Ceramics International
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Samples of SiC+10 vol%(Al2O3+Dy2O3) and SiC+10 vol%(Al2O3+Yb2O3) mixtures were obtained by cold
isostatic pressing and sintered for one hour in a dilatometer at 1800 °C and 1900 °C, applying heating rates of 10,
20 and 30 °C/min. The results of the complete sintering cycle indicated that the heating rates do not significantly
influence the shrinkage, but that temperature and total sintering time may be relevant factors. The compacts
sintered at 1900 °C shrank on average 9% more than those sintered at 1800 °C, and it was found that the
sintering time can be reduced by 40–50% at faster heating rates. The maximum shrinkage rates occurred at
temperatures lower than those of the sintering thresholds for the two mixtures, two temperatures and three
heating rates. It was also found that after formation of the liquid, the mechanisms of particle rearrangement and
solution-precipitation were not as fast as reported in the literature, even at high heating rates, for example 30 °C/
min, but they are responsible for much of the shrinkage occurring throughout the sintering cycle.
Como referenciar
RIBEIRO, S.; GENOVA, L.A.; RIBEIRO, G.C.; OLIVEIRA, M.R.; BRESSIANI, A.H.A. Effect of temperature and heating rate on the sintering performance of SiC-Al2O3-Dy2O3 and SiC-Al2O3-Yb2O3 systems. Ceramics International, v. 43, n. 18, p. 16048-16054, 2017. DOI: 10.1016/j.ceramint.2017.09.118. Disponível em: http://repositorio.ipen.br/handle/123456789/28173. Acesso em: 20 Mar 2026.
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.