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Title: TiO2 additives for in situ formation of toughened silicon nitride-based composites
Authors: Duan, Ren-Guan ×
Roebben, Gert
Vleugels, Jef
Van der Biest, Omer #
Issue Date: Sep-2003
Publisher: North-Holland
Series Title: Materials Letters vol:57 issue:26-27 pages:4156-4161
Abstract: This paper is focussed on the reinforcing phases developing in a Si3N4-based composite microstructure when sintering a powder mixture of 74 wt.% Si3N4, 20 wt.% TiO2, and 6 wt.% Y2O3. Micron- and submicron-sized as well as Al2O3 and Al2O3 + SiO2-coated submicron-sized TiO2 powders were used to prepare these in situ composites consisting Of Si2N2O, alpha-Si3N4, beta-Si3N4, and TiN. The impulse excitation technique was used to evaluate the intergranular glass phase, which affects crack growth and high-temperature deformation. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to investigate the reinforcing phases. The influence of the TiO2-additive powder characteristics on the microstructure and properties of the ceramics is reported. (C) 2003 Elsevier Science B.V. All rights reserved.
URI: 
ISSN: 0167-577X
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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