Morphology of tetragonal ZrO/sub 2/ in a ternary (Mg,Y)-PSZ

Journal Article · Tue Mar 31 23:00:00 EST 1987 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1987.tb04969.x· OSTI ID:5620003

Lee, R R; Heuer, A H

The high fracture toughness of optimally-fabricated precipitation-toughened partially-stabilized ZrO/sub 2/'s (PSZ's) is due to the stress-induced martensitic transformation of tetragonal (t) precipitates to monoclinic (m) symmetry in the stress fields of propagating cracks. The precipitation of tetragonal (t) ZrO/sub 2/ in a ternary (Mg,Y)-PSZ has been studied. Nucleation of t-ZrO/sub 2/ occurs homogeneously, as in other PSZ's, and coarsened precipitates are multivariant and have an unusual tetrahedral morphology.

• Research Organization: Dept. of Metallurgy and Materials Science, Case Western Reserve Univ., Cleveland, OH 44106
• OSTI ID: 5620003
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 70:4; ISSN JACTA
• 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
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CRACK PROPAGATION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
FRACTURE PROPERTIES
MAGNESIUM COMPOUNDS
MECHANICAL PROPERTIES
MONOCLINIC LATTICES
MORPHOLOGY
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PRECIPITATION
SEPARATION PROCESSES
STRESSES
STRUCTURAL CHEMICAL ANALYSIS
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES