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Ferroelasticity of t ‘‐Zirconia: II, In situ Straining in a High‐Voltage Electron Microscope
Author(s) -
Baufeld Bernd,
Baither Dietmar,
Messerschmidt Ulrich,
Bartsch Martin,
Foitzik Andreas H.,
Rühle Manfred
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb03041.x
Subject(s) - microstructure , materials science , electron microscope , tetragonal crystal system , perpendicular , crystallography , scanning electron microscope , deformation (meteorology) , ultimate tensile strength , in situ , ferroelasticity , optics , composite material , crystal structure , chemistry , geometry , ferroelectricity , optoelectronics , dielectric , physics , mathematics , organic chemistry
The ferroelastic deformation of t ‐ZrO 2 , the microstructure of which was described in detail in Part I, was investigated by in situ deformation experiments in the high‐voltage electron microscope at 1150°3C. During the experiments those two domain variants with their c‐axes perpendicular to the [010] tensile direction were transformed into the third one with its c‐axis parallel to the tensile direction. The subsequent ‘switching’ of the domains inside the colonies proceeds much faster than the penetration of the transformation front into a neighboring colony. Therefore, the transformed region, exhibiting a unique tetragonal structure and containing residual defects, preferentially expands into the longitudinal directions of the colonies. The transformation of single domains proceeds instantaneously within the time resolution of the video tape recording.