Ferroelastic domain formation and switching as a toughening mechanism in ceria-doped zirconia

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1991

OSTI ID:7182418

Prettyman, K M

Ceria-doped zirconia materials were prepared using various concentrations of ceria (12, 14, 16, and 20 m/0) as well as from zirconia obtained from two different commercial sources. 12 m/O Ce-TZP obtained from one source exhibited extensive ferroelastic domain formation/switching behavior that was separable from the t to m stress induced martensitic phase transformation prevalent in zirconia materials. The ferroelastic phenomenon occurred in both tension and compression, at a stress lower than that necessary for t to m phase transformation. The 12 m/O Ce-PZP made from an alternate source again showed signs of the ferroelastic phenomenon although much less pronounced. In the second material, the two phenomena were separable only under tensile stress and not in compression, due to phase transformation in this material being significantly enhanced by an impurity. Various methods were used to determine the contribution of each of the two toughening mechanisms to the overall measured toughness of the material. Ceria-doped zirconia containing 14, 16, and 20 m/0 ceria were used to determined inherent material toughness and contributions to toughness due to reversible t to m phase transformation.

• Research Organization: Utah Univ., Salt Lake City, UT (United States)
• OSTI ID: 7182418
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CRYSTAL DOPING
DOMAIN STRUCTURE
DOPED MATERIALS
FRACTURE PROPERTIES
MATERIALS
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES