IZHEVSKYI, V.A.GENOVA, L.A.BRESSIANI, A.H.A.BRESSIANI, J.C.HEINRICH, J.C.ALDINGER, F.2014-12-172014-12-172014-12-172014-12-172001IZHEVSKYI, V.A.; GENOVA, L.A.; BRESSIANI, A.H.A.; BRESSIANI, J.C. Liquid-phase sintered silicon carbide based ceramics with AIN-Ysub(2)Osub(3) and AiN-Lasub(2)Osub(3). In: HEINRICH, J.C. (ed.); ALDINGER, F. (ed.). <b>Ceramic Materials and Components Engines</b>. p. 593-598. DOI: <a href="https://dx.doi.org/10.1002/9783527612765.c101">10.1002/9783527612765.c101</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/23050.http://repositorio.ipen.br/handle/123456789/23050Microstructure development and phase formation processes during sintering of silicon carbide based materials with 10 vol.% of AIN - Y2O;, or AIN - LazOz sintering additives were investigated. Densification of the materials occurred by liquid-phase sintering mechanism. Ratio of @- and B-SiC powders in the initial mixtures was a variable parameter. Shrinkage behavior during sintering was shown to strongly depend both on the combination of sintering additives and on the sintering atmosphere used. Kinetics of B-SiC to aSiC phase transformation under conditions of postsintering heat treatment at 1900-1950°C was studied, the degree of transformation determined by quantitative xray analysis. Evolution of microstructure resulting from B to a phase transformation was followed up by scanning electron microscopy. Transformationcontrolled grain growth mechanism similar to the one observed for silicon nitride based ceramics was established. Possibility of in-situ platelet reinforced dense SiC-based ceramics fabrication by means of sintering was Shown.593-598openAccesssilicon carbidessinteringheat treatmentsadditivesshrinkagemicrostructurephase transformationsscanning electron microscopyCapítulo de livro10.1002/9783527612765.c101https://orcid.org/0000-0002-5172-5082