Ferroelastic domain switching in tetragonal zirconia single crystals-microstructural aspects

Journal Article · Mon Apr 01 04:00:00 EST 1991 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1991.tb06929.x· OSTI ID:5156626

Chan, C J; Lange, F F; Ruehle, M ^[1]; Jue, J F; Virkar, A V ^[2]

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1. Materials Dept., Univ. of California, Santa Barbara, CA (US)
2. Dept. of Materials Science and Engineering, Univ. of Utah, Salt Lake City, UT (US)

This paper reports on ferroelastic domain switching which is one of the possible toughening mechanisms in ceramic materials. Microstructural evidence of domain reorientation (switching) in polydomain tetragonal zirconia single crystals is observed upon the application of a unidirectional compressive stress at 1000 {degrees} and 1400 {degrees} C. Dark-field imaging of the three (112) tetragonal twin variants in a (111) zone indicates that two sets of twin variants grow at the expense of the third set upon application of uniaxial compression. The diminishing variant is the one with its axis parallel to the compression axis. Inducing cracks into polydomain tetragonal zirconia single crystals provides further evidence of domain reorientation near the crack surface. It is noted again that two sets of twin variants grow at the expense of the third set. A construction for the orientation relationship of domains and their twin boundaries is presented, and a relation between shear stress and reorientation is proposed.

• OSTI ID: 5156626
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 74:4; 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
CERAMICS
CHALCOGENIDES
COMPRESSION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
ELASTICITY
FRACTURE PROPERTIES
GRAIN ORIENTATION
MECHANICAL PROPERTIES
MICROSTRUCTURE
MONOCRYSTALS
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
TENSILE PROPERTIES
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES