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Raman tensor analysis of baddeleyite single‐crystal and its application to define crystallographic domains in polycrystalline zirconia
Author(s) -
Fukatsu Kyoju,
Zhu Wenliang,
Pezzotti Giuseppe
Publication year - 2010
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200945358
Subject(s) - monoclinic crystal system , crystallite , tetragonal crystal system , cubic zirconia , raman spectroscopy , crystallography , materials science , phase (matter) , single crystal , crystal structure , chemistry , optics , ceramic , physics , metallurgy , organic chemistry
The angular dependence of polarized Raman intensity for the A g and B g modes was investigated and the full set of Raman tensor elements defined for a baddeleyite single‐crystal, namely the monoclinic polymorph of zirconia (ZrO 2 ). Based on the quantitative knowledge of the tensor elements, a method has been proposed for the determination of unknown crystallographic textures in monoclinic zirconia. An application of this method is also shown, which consists of a Raman analysis of crystal orientation on the microscopic scale in polycrystalline ZrO 2 after its tetragonal‐to‐monoclinic ( t → m ) polymorphic transformation (i.e., occurred under an externally applied stress field). This working example not only confirms the well‐known phenomenon of stress‐induced phase transformation in polycrystalline zirconia, but also proves the existence of textured domain patterns in the monoclinic phase on a scale larger than that of individual grains. This finding might suggest that the structural and functional properties of polycrystalline zirconia after partial phase transformation should be reinterpreted with taking into account a crystallographic reorientation effect.