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Neutron Diffraction Study of the Pseudo-Macro Residual Stresses in ZrO2(CeO2)/Al2O3 Ceramic Composites

Published online by Cambridge University Press:  06 March 2019

Xun-Li Wang ,
C. R. Hubbard ,
K. B. Alexander ,
P. F. Becher ,
J. A. Fernandez-Baca  and
S. Spooner
Xun-Li Wang
Affiliation:
Metal and Ceramics Division Oak Ridge National Laboratory Oak Ridge, TN 37831
C. R. Hubbard
Affiliation:
Metal and Ceramics Division Oak Ridge National Laboratory Oak Ridge, TN 37831
K. B. Alexander
Affiliation:
Metal and Ceramics Division Oak Ridge National Laboratory Oak Ridge, TN 37831
P. F. Becher
Affiliation:
Metal and Ceramics Division Oak Ridge National Laboratory Oak Ridge, TN 37831
J. A. Fernandez-Baca
Affiliation:
Solid State Division Oak Ridge National Laboratory Oak Ridge, TN 37831
S. Spooner
Affiliation:
Solid State Division Oak Ridge National Laboratory Oak Ridge, TN 37831
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Abstract

Neutron powder diffraction techniques have been used to characterize the pseudo-macro (PM) residual stresses in ZrO2(CeO2)/Al2O3 ceramic composites as a function of ZrO2(CeO2) volume fraction and fabrication procedures. The diffraction data were analyzed using the Rietveld structure refinement technique. From the refinement, we found that the CeO2 stabilized tetragonal ZrO2 particles were in tension and the Al2O3 matrix was in compression. Different sintering time had little impact on the PM stresses. On the other hand, the magnitude of the PM stresses in both ZrO2 and Al2O3 decreased linearly with the increase of their volume fractions.

Type
IX. Stress and Strain Determination by Diffraction Methods, Peak Broadening Analysis
Information
Advances in X-Ray Analysis , Volume 36: Forty-First Annual Conference on Applications of X-ray Analysis, August 3-7, 1992 , 1992 , pp. 499 - 504
Copyright
Copyright © International Centre for Diffraction Data 1992

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References

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