Assessment of residual strain in zirconia-toughened alumina using neutron diffraction

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1993.tb08349.x· OSTI ID:6187102

Riessen, A van; O'Connor, B H ^[1]

---

1. Curtin Univ. of Technology, Perth (Australia). Dept. of Applied Physics

Substantial strains may be generated in [alpha]-alumina (Al[sub 2]O[sub 3]) matrix ceramics by including zirconia (ZrO[sub 2]) second-phase particles, the material being known as zirconia-toughened alumina (ZTA). These strains arise from the expansion in unit cell volume resulting from tetragonal-to-monoclinic transformation in the ZrO[sub 2] particles and from thermal contraction mismatch (TCM) caused by differences between the expansion coefficients of the Al[sub 2]O[sub 3] and ZrO[sub 2] phases. Neutron powder diffractometry has been used to examine bulk, volume-averaged, microstrain character for each of the crystalline phases in a suite of zirconia-toughened alumina ceramics. Line-broadening estimates and cell parameter shifts, determined by the Rietveld method, have provided microstrain assessments of the nonuniform and uniform types, respectively.

• OSTI ID: 6187102
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 76:8; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
RESIDUAL STRESSES
ZIRCONIUM OXIDES
CRYSTALLOGRAPHY
EXPERIMENTAL DATA
GRAIN ORIENTATION
MATRIX MATERIALS
MICROSTRUCTURE
MONOCLINIC LATTICES
NEUTRON DIFFRACTION
STRAINS
TETRAGONAL LATTICES
ALUMINIUM COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
INFORMATION
MATERIALS
NUMERICAL DATA
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
SCATTERING
STRESSES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties