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Title: Preparation and properties of x-sialon
Authors: Zhou, Y ×
Vleugels, Jef
Laoui, Tahar
Ratchev, Petar
Van der Biest, Omer #
Issue Date: Sep-1995
Publisher: Chapman hall ltd
Series Title: Journal of materials science vol:30 issue:18 pages:4584-4590
Abstract: X-sialon has been produced by hot pressing Si3N4-Al2O3-SiO2 powder mixtures and Si3N4 powder-mullite gel mixtures at 1650 degrees C. The formation mechanism of X-sialon has been studied and is correlated with the processing technique for the two preparation routes. Microprobe analysis of the obtained X-sialon phase, combined with previous observed compositions and literature formulae suggests that, at 1650 degrees C, X-sialon exists as a narrow solid solubility region on the Si3N4-mullite line in the Si3N4-SiO2-Al2O3-AlN phase diagram. The physical, mechanical and chemical properties of X-sialon have been evaluated. X-sialon has a modest hardness of 1280 kg mm(-2), a fracture toughness of 1.7 MPa m(1/2), and an elastic modulus of 213 GPa. X-sialon exhibits excel lent chemical stability in contact with iron-based alloys at 1200 degrees C.
ISSN: 0022-2461
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
Mechanical Metallurgy Section (-)
× corresponding author
# (joint) last author

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