Premium
Ferroelasticity of t ‘‐Zirconia: I, High‐Voltage Electron Microscopy Studies of the Microstructure in Polydomain Tetragonal Zirconia
Author(s) -
Baither Dietmar,
Baufeld Bernd,
Messerschmidt Ulrich,
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.tb03040.x
Subject(s) - tetragonal crystal system , microstructure , materials science , cubic zirconia , crystallography , electron microscope , crystal twinning , ferroelasticity , macle , plane (geometry) , condensed matter physics , scanning electron microscope , phase (matter) , optics , crystal structure , composite material , chemistry , geometry , ferroelectricity , dielectric , physics , optoelectronics , ceramic , mathematics , organic chemistry
The microstructure of polydomain tetragonal zirconia ( t ‐ZrO 2 ), i.e., a ZrO 2 modification exhibiting ferroelastic behavior, is studied by high‐voltage electron microscopy. This material consists of three domain variants of the tetragonal phase with their c ‐axes nearly orthogonal to each other. Always two variants of these platelike domains are alternately arranged, forming elongated regular colonies. Hence, in both variants the common habit plane of the domains is a {110} twin plane. The colonies are of columnar shape with a longitudinal axis. They are bound by {110} planes, too, which are twin planes for the domains in the contiguous colonies. Owing to their particular structure and the helical arrangement of the adjoining colonies, the material remains coherent and pseudocubic over large macroscopic regions, although it is formed by different tetragonal domains.