Transformation of ceria-doped tetragonal zirconia polycrystals by annealing in water

Journal Article · Tue Oct 01 04:00:00 EDT 1985 · Am. Ceram. Soc. Bull.; (United States)

OSTI ID:6242528

Sato, T; Shimada, M

Sintering and phase transformation of ceriadoped tetragonal ZrO2 polycrystals were investigated using coprecipitated fine-grained zirconia (ceria) powders containing 8% to 12 mol% CeO2 as starting materials. The rate of grain growth of ceria-doped zirconia was faster than that of yttria-doped zirconia. The Vickers microhardness and fracture toughness of ceria-doped zirconia were approx. =10 GPa and 11 to 17 MN/m /SUP 3/2/ , respectively. The tetragonal-to-monoclinic phase transformation in ceria-doped zirconia ceramics was observed over the range 80 to 300C. The phase transformation was greatly accelerated by low-temperature annealing in water. The rate of the phase transformation decreased with increasing CeO2 concentration and with decreasing grain size.

• Research Organization: Tohoku Univ., Sendai
• OSTI ID: 6242528
• Journal Information: Am. Ceram. Soc. Bull.; (United States), Journal Name: Am. Ceram. Soc. Bull.; (United States) Vol. 64:10; ISSN ACSBA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ANNEALING
CERAMICS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CRYSTAL DOPING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLOGRAPHY
CRYSTALS
FABRICATION
FRACTURE PROPERTIES
HEAT TREATMENTS
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
MECHANICAL PROPERTIES
MONOCLINIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POLYCRYSTALS
POWDERS
RARE EARTH COMPOUNDS
SINTERING
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
VICKERS HARDNESS
WATER
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES