Properties of zirconia-ceria-hafnia alloys

Journal Article · Tue Jun 01 00:00:00 EDT 1993 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1993.tb03935.x· OSTI ID:6402179

Funkenbusch, E F; Plovnick, R H ^[1]; Becher, P F ^[2]

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1. 3M Ceramic Technology Center, St. Paul, MN (United States)
2. Oak Ridge National Lab., TN (United States)

Tetragonal zirconia alloys containing up to 18 mol% ceria and 30 mol% hafnia were prepared by several wet-chemical techniques, sintered to high density, and their microstructural and mechanical properties studied. Toughening in such alloys depends on the retention of the metastable tetragonal phase and the stress required for its transformation to the monoclinic phase. The degree of metastability of the tetragonal phase in these ternary zirconia alloys was a function of the relative amounts of ceria and hafnia present. Such alloying, along with control of grain size, provides an ability to modify the fracture toughness and the temperature range over which the toughness is optimized.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6402179
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:6; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CERAMICS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CRYSTAL STRUCTURE
FABRICATION
GRAIN SIZE
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
MECHANICAL PROPERTIES
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SINTERING
SIZE
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES