Strength and phase stability of yttria-ceria-doped tetragonal zirconia/alumina composites sintered and hot isostatically pressed in argon-oxygen gas atmosphere

Journal Article · Fri Mar 01 00:00:00 EST 1991 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1991.tb04067.x· OSTI ID:5159354

Hirano, M; Inada, H ^[1]

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1. Noritake Co., Ltd., Noritake, Nagoya (JP)

Yttria-ceria-doped tetragonal zirconia ((Y,Ce)-TZP)/alumina (Al{sub 2}O{sub 3}) composites were fabricated by hot isostatic pressing at 1400{degrees} to 1450{degrees}C and 196 MPa in an Ar-O{sub 2} atmosphere using the fine powders prepared by hydrolysis of ZrOCl{sub 2} solution. The composites consisting of 25 wt% Al{sub 2}O{sub 3} and tetragonal zirconia with compositions 4 mol% YO{sub 1.5}{minus}4 mol% CeO{sub 2}-ZrO{sub 2} and 2.5 mol% YO{sub 1.5}{minus}5.5 mol% CeO{sub 2}-ZrO{sub 2} exhibited means fracture strength as high as 2000 MPa and were resistant to phase transformation under saturated water vapor pressure at 180{degrees}C (1 MPa). Postsintering hot isostatic pressing of (4Y, 4Ce)-TZP/Al{sub 2}O{sub 3} and (2.5Y, 5.5Ce)-TZP/Al{sub 2}O{sub 3} composites was useful to enhance the phase stability under hydrothermal conditions and strength.

• OSTI ID: 5159354
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 74:3; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
FRACTURE PROPERTIES
STABILITY
ZIRCONIUM OXIDES
ARGON
CERIUM OXIDES
CONTROLLED ATMOSPHERES
DOPED MATERIALS
FABRICATION
HOT PRESSING
OXYGEN
PHASE TRANSFORMATIONS
POWDERS
SINTERING
TETRAGONAL LATTICES
YTTRIUM OXIDES
ALUMINIUM COMPOUNDS
ATMOSPHERES
CERIUM COMPOUNDS
CHALCOGENIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELEMENTS
FLUIDS
GASES
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PRESSING
RARE EARTH COMPOUNDS
RARE GASES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360603* - Materials- Properties