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Title: Si3N4-based composites with micron and nano-sized TiC0.5N0.5 particles
Authors: Jiang, Dongtao ×
Vanmeensel, Kim
Vleugels, Jef
Van der Biest, Omer #
Issue Date: Jul-2004
Series Title: Silicates Industriels vol:69 issue:7-8 pages:267-274
Abstract: The microstructural and mechanical properties of Si3N4-based composites with different amounts of TiC0.5N0.5, fabricated by hot-pressing at 1650degreesC for 1 hour, are investigated and evaluated. The hardness of the micron-sized TiCN powder based composites increased with increasing TiCN content from 20 up to 40 vol. %, whereas the bending strength decreased. The fracture toughness reaches a maximum at 30 vol. % TiCN and exhibits a strong anisotropy with respect to the hot-pressing direction. The 30 vol % TiN composite, used as a reference material, has a lower hardness and strength but a significantly higher and more isotropic toughness. The influence of the TiCN particle size on the composite properties was studied using a nano-sized TiCN starting powder. The hardness of the composite was significantly increased using the finer powder, but the toughness was lower. The alpha/beta Si3N4 ratio was measured by X-ray diffraction revealing that the alpha-beta conversion during hot-pressing is strongly reduced with increasing TiCN content and decreasing TiCN particle size.
ISSN: 0037-5225
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
Department of Materials Engineering - miscellaneous
× corresponding author
# (joint) last author

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