Strengthening of ceria-doped tetragonal zirconia polycrystals by reduction-induced phase transformation

Journal Article · Thu Jun 01 00:00:00 EDT 1989 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1989.tb06267.x· OSTI ID:5057230

Heussner, K H; Claussen, N ^[1]

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1. Technisch Universitaet Hamburg-Harburg, Arbeitsbereich Technische Keramik, D-2100 Hamburg 90 (DE)

This paper reports that phase-transformation-induced compressive surface stresses were introduced into ceria-doped tetragonal zirconia polycrystals by reduction of CeO{sub 2}. Four-point-bending strength of sintered ZrO{sub 2} containing 12 mol% CeO{sub 2} increased from 240 to 545 MPa after it was annealed at 1400{degrees} C for 2 h in nitrogen. The strength of the same material hot isostatically pressed in oxygen increased after it was annealed in nitrogen for 2 h at 1500{degrees} C from 430 to 595 MPa.

• OSTI ID: 5057230
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 72:6; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANNEALING
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COMPRESSION
CRYSTAL DOPING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALS
ELEMENTS
FABRICATION
HEAT TREATMENTS
HOT PRESSING
MATERIALS WORKING
MECHANICAL PROPERTIES
NITROGEN
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POLYCRYSTALS
PRESSING
RARE EARTH COMPOUNDS
REDUCTION
SINTERING
STRESSES
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
VERY HIGH PRESSURE
VERY HIGH TEMPERATURE
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES