Crack-tip transformation zones in toughened zirconia

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb06743.x· OSTI ID:6021639

Marshall, D B; Shaw, M C ^[1]; Kauskardt, R H; Ritchie, R O ^[2]; Readey, M J; Heuer, A H ^[3]

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1. Rockwell International Science Center, Thousand Oaks, CA (US)
2. Center for Advanced Materials, Lawrence Berkeley Lab., Univ. of California, Berkeley, CA (US)
3. Dept. of Materials Science and Engineering, Case Western Reserve Univ., Cleveland, OH (US)

Transformation zones surrounding cracks in several toughened magnesia-partially-stabilized zirconia ceramics are characterized by optical interference measurements of surface uplift and by Raman microprobe spectroscopy. The measurements demonstrate that the volume fraction of transformation is nonuniform within the zone and that the extent of the frontal zone is approximately the same as that of the wake. Results are used to evaluate the crack-tip shielding stress intensity factor and to compare with the measured fracture toughness.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6021639
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:9; ISSN JACTA; ISSN 0002-7820
• 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
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
CHALCOGENIDES
CHEMICAL ANALYSIS
CRACK PROPAGATION
HARDENING
ION MICROPROBE ANALYSIS
MICROANALYSIS
NONDESTRUCTIVE ANALYSIS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RAMAN SPECTRA
SPECTRA
SURFACE HARDENING
SURFACE TREATMENTS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES