Transformation-toughening in partially-stabilized zirconia (PSZ)

Journal Article · Mon Oct 01 00:00:00 EDT 1979 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(79)90046-4· OSTI ID:5687112

Porter, D L ^[1]; Evans, A G; Heuer, A H

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1. Case Western Reserve Univ., Cleveland, OH

The significant fracture toughness of optimally-fabricated partially-stabilized zirconia (PSZ) is due to mechanical energy absorption in the vicinity of the tip of a propagating crack due to stress-induced phase transformations occurring within metastable precipitates. Eshelby's transformed-inclusion analysis has been used to model the transformation toughening: a transformation zone is calculated from an energy balance approach, the size of this zone determining the mechanical energy dissipated during crack propagation. The increase in apparent fracture surface energy predicted by the model is in tolerable agreement with experiment, although the model does not account for multiparticle interactions, interfacial energy changes, and transformation-induced twinning.

• OSTI ID: 5687112
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 27:10; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CHALCOGENIDES
CRACKS
CRYSTAL-PHASE TRANSFORMATIONS
FRACTURE PROPERTIES
LATTICE PARAMETERS
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
STABILITY
STRAINS
STRESSES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES