Elastic moduli of pure and gadolinium doped ceria revisited: Sound velocity measurements

Nimrod Yavo; David Noiman; Ellen Wachtel; Sangtae Kim; Yishai Feldman; Igor Lubomirsky; Ori Yeheskel

doi:10.1016/j.scriptamat.2016.05.029

Elastic moduli of pure and gadolinium doped ceria revisited: Sound velocity measurements

Nimrod Yavo, David Noiman, Ellen Wachtel, Sangtae Kim, Yishai Feldman, Igor Lubomirsky, Ori Yeheskel

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

The Young's, shear and bulk moduli of dense (> 95%) Gd-doped ceria (Ce_1-xGd_xO_2-x/2) ceramics were determined as a function of Gd content using the ultrasonic pulse-echo method and corrected for porosity according to both static and dynamic models. With increasing defect concentration (0-20 mol% Gd), the Young's and shear moduli decrease linearly by 10% while for 29 mol%, the values lie above the linear fit; the bulk modulus decreases linearly within the complete range. We conclude that structural changes, induced by oxygen vacancy ordering for x > 0.2, may influence the uniaxial and shear moduli, leaving the bulk modulus unaffected.

Original language	English
Pages (from-to)	86-89
Number of pages	4
Journal	Scripta Materialia
Volume	123
DOIs	https://doi.org/10.1016/j.scriptamat.2016.05.029
State	Published - 1 Oct 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

Funding

The authors thank the US–Israel Binational Science Foundation ( 2012237 ) for funding this research. I.L. wishes to acknowledge the assistance of the Nancy and Stephen Grand Research Center for Sensors and Security. The research is also made possible in part by the generosity of the Harold Perlman Family.

Funders	Funder number
US-Israel Binational Science Foundation	2012237

Keywords

Elastic properties
Gd-doped ceria
Porosity
Sound velocity

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10.1016/j.scriptamat.2016.05.029

Cite this

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abstract = "The Young's, shear and bulk moduli of dense (> 95%) Gd-doped ceria (Ce1-xGdxO2-x/2) ceramics were determined as a function of Gd content using the ultrasonic pulse-echo method and corrected for porosity according to both static and dynamic models. With increasing defect concentration (0-20 mol% Gd), the Young's and shear moduli decrease linearly by 10% while for 29 mol%, the values lie above the linear fit; the bulk modulus decreases linearly within the complete range. We conclude that structural changes, induced by oxygen vacancy ordering for x > 0.2, may influence the uniaxial and shear moduli, leaving the bulk modulus unaffected.",

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AU - Feldman, Yishai

AU - Lubomirsky, Igor

AU - Yeheskel, Ori

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Elastic moduli of pure and gadolinium doped ceria revisited: Sound velocity measurements

Abstract

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Keywords

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