Structural and mechanical property changes in toughened magnesia-partially-stabilized zirconia at low temperatures
The mechanical properties of high-toughness magnesia-partially-stabilized zirconia were found to be dramatically altered by a single cooling cycle between room temperature and - 196/sup 0/C. Raman spectroscopy and X-ray diffraction were used to correlate the changes in mechanical properties with structural changes that occur at temperatures below -- 100/sup 0/C. Most of the the tetragonal precipitates that are responsible for toughening transformed to an orthorhombic phase with unit-cell volume intermediate between those of the tetragonal and monoclinic phases. The orthorhombic phase was stable with heating to 300/sup 0/C, but it transformed back to the tetragonal structure when heated to 400/sup 0/C.
- Research Organization:
- 9500753
- OSTI ID:
- 5918064
- Journal Information:
- J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 72:2; ISSN JACTA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Transformation toughening of ceramics. Annual report No. 2, 1 September 1986-31 August 1987
Analysis of toughening of magnesia partially stabilized zirconia, due to dilatational transformation
Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
LASER SPECTROSCOPY
LOW TEMPERATURE
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MECHANICAL PROPERTIES
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RAMAN SPECTROSCOPY
SCATTERING
SPECTROSCOPY
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES