Liquid phase sintered SiC. Processing and transformation controlled microstructure tailoring
Carregando...
Data
Data de publicação
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Materials Research
Exportar
Resumo
Microstructure development and phase formation processes during sintering of silicon carbide
based materials with AlN-Y2O3, AlN-Yb2O3, and AlN-La2O3 sintering additives were investigated.
Densification of the materials occurred by liquid-phase sintering mechanism. Proportion of α- and
β-SiC powders in the initial mixtures was a variable parameter, while the molar ratio of AlN/RE2O3,
and the total amount of additives (10 vol. %) were kept constant. Shrinkage behavior during sintering
in interrelation with the starting composition of the material and the sintering atmosphere was
investigated by high temperature dilatometry. Kinetics of β-SiC to α-SiC phase transformation
during post-sintering heat treatment at temperatures 1900-1950 °C was studied, the degree of phase
transformation being determined by quantitative x-ray analysis using internal standard technique.
Evolution of microstructure resulting from β-SiC to α-SiC transformation was followed up by
scanning electron microscopy on polished and chemically etched samples. Transformation-controlled 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 with
improved mechanical properties by means of sintering was shown.
Como referenciar
IZHEVSKYI, V.A.; GENOVA, L.A.; BRESSIANI, A.H.A.; BRESSIANI, J.C. Liquid phase sintered SiC. Processing and transformation controlled microstructure tailoring. Materials Research, v. 3, n. 4, p. 131-138, 2000. DOI: 10.1590/S1516-14392000000400007. Disponível em: http://repositorio.ipen.br/handle/123456789/7201. 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.