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Growth modes for monoclinic yttria‐stabilized zirconia during the martensitic transformation
Author(s) -
Wang Yongzhe,
Xu Fangfang,
Gauvin Raynald,
Kong Mingguang,
Khan Matiullah,
Liu Ziwei,
Zeng Yi
Publication year - 2017
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/jace.15004
Subject(s) - monoclinic crystal system , tetragonal crystal system , materials science , crystallography , diffusionless transformation , martensite , electron diffraction , phase (matter) , metastability , diffraction , condensed matter physics , optics , crystal structure , microstructure , composite material , chemistry , physics , organic chemistry
The tetragonal to monoclinic martensitic transformation of plasma‐sprayed 3 mol% Y 2 O 3 –ZrO 2 coatings is investigated by electron backscatter diffraction. The original metastable tetragonal phase shows an approximate “basal” texture with {001} t parallel to the coating surface. Based on the orientation analysis, plenty of monoclinic variants with atypical correspondence which indicates the c t axis transforms to the a m axis where (100) m //(001) t , (010) m , and (001) m //{110} t are clearly identified in addition to the correspondence where the c t axis transforms to the c m axis. Moreover, three growth modes are proposed and discussed according to strain accommodation. The observed sequential growth obeys the correspondence of the c t axis to the c m axis. Fourfold growth combines the correspondences of the c t axis to the c m and a m axes. The interleaving growth follows the correspondences of the c t axis to the c m axis within three tetragonal domains. These phenomena demonstrate the typical twin‐related and self‐accommodating configuration, which is in agreement with the phenomenological theory. These finding provide fundamental insight into the martensitic transformation mechanism and demonstrate a route for increasing the lifetime by controlling the tetragonal to monoclinic phase transformation.