Title: Influence of phase constitution on mechanical performance of 12Ce-3Y-ZrO2/2.5 wt pct Al2O3 composites
Authors: Huang, Shuigen ×
Li, Lianfu
Vleugels, Jef
Van der Biest, Omer #
Issue Date: May-2004
Publisher: Journal mater sci technol
Series Title: Journal of materials science & technology vol:20 issue:3 pages:284-286
Abstract: The phase constitution of a composite consisting of 1.2 at. pct CeO2-3 at. Pct Y2O3-ZrO2/2.5 wt pct Al2O3 (3Y12Ce2.5Al) was determined by thermodynamic calculation. It is a combination of 36.9 at. pct cubic phase and 63.1 at. pct tetragonal phase at 1450 C. Green compacts were fabricated by cold isostatic pressing with powder synthesized by coating technique, and pressureless sintered at 1450 degreesC. The fracture toughness and Vickers hardness, evaluated by the micro-indentation method, are 2.02 MPa(.)m(1/2) and 11.395 GPa, respectively. The addition of 3 at. Pct Y2O3 to 12 at. pct CeO2-ZrO2 ceramic leads to drastically decrease in toughness compared to composites without yttria stabilizer. No monoclinic phase is detected on the surface of all the ground samples. The high content of cubic phase and lack of phase transformation can be attributed to the low toughness based on the thermodynamic: prediction.
ISSN: 1005-0302
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
Physical Metallurgy and Materials Engineering Section (-)
× corresponding author
# (joint) last author

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