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Author Lee, R. R. ♦ Heuer, A. H.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ZIRCONIUM OXIDES ♦ CRYSTAL-PHASE TRANSFORMATIONS ♦ FRACTURE PROPERTIES ♦ CRACK PROPAGATION ♦ MAGNESIUM COMPOUNDS ♦ MONOCLINIC LATTICES ♦ MORPHOLOGY ♦ PRECIPITATION ♦ STRESSES ♦ STRUCTURAL CHEMICAL ANALYSIS ♦ TETRAGONAL LATTICES ♦ YTTRIUM COMPOUNDS ♦ ALKALINE EARTH METAL COMPOUNDS ♦ CHALCOGENIDES ♦ CRYSTAL LATTICES ♦ CRYSTAL STRUCTURE ♦ MECHANICAL PROPERTIES ♦ OXIDES ♦ OXYGEN COMPOUNDS ♦ PHASE TRANSFORMATIONS ♦ SEPARATION PROCESSES ♦ TRANSITION ELEMENT COMPOUNDS ♦ ZIRCONIUM COMPOUNDS ♦ Ceramics, Cermets, & Refractories- Structure & Phase Studies ♦ Ceramics, Cermets, & Refractories- Mechanical Properties
Abstract 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.
Educational Use Research
Learning Resource Type Article
Publisher Date 1987-04-01
Publisher Place United States
Journal J. Am. Ceram. Soc.
Volume Number 70
Issue Number 4
Organization Dept. of Metallurgy and Materials Science, Case Western Reserve Univ., Cleveland, OH 44106


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