Densification and microstructure of Si3N4-TiN ceramic composites
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Silicon nitride is a ceramic material widely used in various structural applications at high temperatures owing to its excellent
combination of mechanical and thermal properties. To increase the application of Si3N4, many researches have been developed to
improve its fracture toughness and processing conditions. In this study, the sintering and microstructure of Si3N4-TiN composites,
containing Al2O3 and Y2O3 as sintering aids, were studied. Samples were obtained by the conventional method of mixing powders
and sintered at 1750 ºC/1 h and 1815 ºC/1 h under nitrogen atmosphere. Density values of the samples were determined by the
Archimedes method, reaching values between 96.9% and 98.0% of theoretical density, with a porosity of less than 0.5%. The
sintered samples were analyzed by X-ray powder diffraction and scanning electron microscopy. The results showed the materials
reached high fracture toughness, low hardness and a microstructure with TiN grains dispersed in a β-Si3N4 matrix containing an
amorphous intergranular phase.
Como referenciar
FERREIRA, T.S.; CARVALHO, F.M.S.; GUEDES-SILVA, C.C. Densification and microstructure of Si3N4-TiN ceramic composites. Cerâmica, v. 65, p. 87-91, 2019. 1. DOI: 10.1590/0366-6913201965S12605. Disponível em: http://repositorio.ipen.br/handle/123456789/29968. 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.