Structural and mechanical property changes in toughened magnesia-partially-stabilized zirconia at low temperatures

Journal Article · Wed Feb 01 00:00:00 EST 1989 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1989.tb06104.x· OSTI ID:5918064

Marshall, D B; James, M R; Porter, J R

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), Vol. 72:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MAGNESIUM OXIDES
MICROSTRUCTURE
ZIRCONIUM OXIDES
LOW TEMPERATURE
MECHANICAL PROPERTIES
PHASE TRANSFORMATIONS
RAMAN SPECTROSCOPY
TETRAGONAL LATTICES
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
LASER SPECTROSCOPY
MAGNESIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties