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Improved stress measurement of YSZ by Raman spectroscopy: Effect of yttrium segregation‐dependent tetragonality
Author(s) -
Cai Huangyue,
Zhang Xing,
Hu Li,
Guo Fangwei,
Wang Xin,
Zhao Xiaofeng,
Ni Na,
Xiao Ping
Publication year - 2020
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13542
Subject(s) - raman spectroscopy , materials science , yttrium , metastability , annealing (glass) , yttria stabilized zirconia , monoclinic crystal system , analytical chemistry (journal) , cubic zirconia , crystallography , ceramic , crystal structure , optics , metallurgy , chemistry , physics , organic chemistry , chromatography , oxide
The Raman peaks of metastable yttria‐stabilized zirconia changed with annealing at high temperatures even before the onset of transformation to any monoclinic phase, leading to ambiguous determination of stress‐free references. In this work, the evolution of the Raman bands of metastable YSZ with annealing for different times at different high temperatures were analyzed using the tetragonality variation, which was consequent on the cation redistribution activated by thermal diffusion. The Raman bands linearly varied with the volume weighted tetragonality over the range studied (1.009‐1.015). The cation diffusion changed the bonds length and the associated Raman modes frequencies. A semiempirical equation was established to amend the available calculation for residual stresses by Raman spectroscopy, based on the variation coefficients ratio of two E g Raman modes (465 cm −1 and 640 cm −1 ).