Strength characteristics of transformation-toughened zirconia

Journal Article · Fri Feb 28 23:00:00 EST 1986 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1986.tb07402.x· OSTI ID:5743466

Marshall, D B

Mechanisms of failure in a transformation-toughened MgO-partially-stabilized ZrO/sub 2/ are identified using in situ observations. The observations are related to measured stress-strain curves, strengths under various loading conditions, strength degradation from surface damage, and comparative strengths and toughnesses of toughened and overaged materials. Both reversible and irreversible tetragonal-to-monoclinic transformations, as well as microcracking, are associated with nonlinear stress-strain curves. The influence of this nonlinear response on stresses produced by flexural loading is evaluated. Failure is preceded by stable growth of microcracks, resultsing in R-curve behavior and damage-tolerant strength characteristics. The implications of R-curve response for strengthening and toughening characteristics are discussed.

• Research Organization: Rockwell International Science Center, Thousand Oaks, CA 91360
• OSTI ID: 5743466
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 69:3; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COAL PREPARATION
COMPARATIVE EVALUATIONS
DIAGRAMS
FAILURES
FRACTURE PROPERTIES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MECHANICAL PROPERTIES
NONLINEAR PROBLEMS
OXIDES
OXYGEN COMPOUNDS
STABILIZATION
STRAINS
STRESS ANALYSIS
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES