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Residual Stresses in Alumina/Ceria‐Stabilized Zirconia Composites
Author(s) -
Sergo Valter,
Wang XunLi,
Clarke David R.,
Becher Paul F.
Publication year - 1995
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.1151-2916.1995.tb08639.x
Subject(s) - materials science , residual stress , cubic zirconia , composite material , hydrostatic equilibrium , raman spectroscopy , neutron diffraction , volume fraction , diffraction , stress (linguistics) , phase (matter) , ceramic , optics , linguistics , philosophy , physics , chemistry , organic chemistry , quantum mechanics
Measurements of the residual stresses in Al 2 O 3 /Ce‐TZP (12 mol% CeO 2 ) sintered composites, containing 10, 20, and 40 vol% zirconia, obtained by neutron diffraction and by piezospectroscopy using optical fluorescence and Raman are compared. The techniques give essentially the same values for the spatial average of the hydrostatic residual stresses in the two phases despite the difference in the parameters measured in the two techniques. The measured stresses are also in accord with those predicted from a stochastic stress analysis for materials cooling from a stressfree temperature of ∼1180°C. Over the range of volume fraction investigated the hydrostatic stress in the alumina phase varies linearly with zirconia content, corresponding most closely to the upper Hashin bound.