At-temperature neutron diffraction investigation of the aging process in magnesia-partially-stabilized zirconia
Creators
- 1. Univ. of Technology, Sydney (Australia)
- 2. Australian Nuclear Science and Technology Organization, Menai (Australia)
- 3. Rutherford Appleton Lab., Chilton (United Kingdom). ISIS Facility
Description
A time-resolved neutron powder diffraction technique has been used to follow the changes occurring during the aging of magnesia-partially-stabilized zirconia at 1,100 C. Through quantitative phase analyses it has been possible to follow the development with aging time of tetragonal zirconia and of the δ-phase (Mg2Zr5O12, related to cubic, but with ordered anion vacancies), both at the expense of cubic zirconia. Changes in lattice parameters have been attributed to the expulsion of MgO stabilizer from the tetragonal zirconia precipitates as the aging proceeds. The broadening of peaks in the neutron diffraction pattern suggests there is considerable strain in the tetragonal precipitates in the c-direction, which is the short dimension in these lenticular precipitates. On cooling, there is some transformation of tetragonal zirconia to the monoclinic and orthorhombic phases
Additional details
Publishing Information
- Journal Title
- Journal of the American Ceramic Society
- Journal Volume
- 77
- Journal Issue
- 12
- Journal Page Range
- p. 3073-3076.
- ISSN
- 0002-7820
- CODEN
- JACTAW
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 26040210
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CRYSTAL-PHASE TRANSFORMATIONS; HEAT TREATMENTS; MAGNESIUM OXIDES; MECHANICAL PROPERTIES; MICROSTRUCTURE; NEUTRON DIFFRACTION; ZIRCONIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; CRYSTAL STRUCTURE; DIFFRACTION; MAGNESIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; SCATTERING; TRANSITION ELEMENT COMPOUNDS; ZIRCONIUM COMPOUNDS