Influence of Gd content on the room temperature mechanical properties of Gd-doped ceria

Roman Korobko; Chien Ting Chen; Sangtae Kim; Sidney R. Cohen; Ellen Wachtel; Nimrod Yavo; Igor Lubomirsky

doi:10.1016/j.scriptamat.2011.10.027

Influence of Gd content on the room temperature mechanical properties of Gd-doped ceria

Roman Korobko, Chien Ting Chen, Sangtae Kim, Sidney R. Cohen, Ellen Wachtel, Nimrod Yavo, Igor Lubomirsky

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

Abstract

High-density ceramics of ceria doped with 0, 3, 5, 10, 15 and 20 mol.% Gd and with grain sizes exceeding 1.5 μm were investigated by nanoindentation. The deduced elastic moduli are independent of Gd content and remain close to the value reported for bulk ceramics (210 ± 5% GPa). All ceramics exhibit transient creep with displacement proportional to the 1/3 power of the time. For 0.05 < x < 0.2, the derived creep magnitude parameter decreases linearly with increasing Gd content. These results strongly suggest that defect rearrangement influences the measurements.

Original language	English
Pages (from-to)	155-158
Number of pages	4
Journal	Scripta Materialia
Volume	66
Issue number	3-4
DOIs	https://doi.org/10.1016/j.scriptamat.2011.10.027
State	Published - Feb 2012
Externally published	Yes

Bibliographical note

Funding Information:
I.L. and S.K. wish to thank the US–Israel Binational Science Foundation for funding this research. The research is also made possible in part by the generosity of the Harold Perlman Family. We also acknowledge support of the G.M.J. Schmidt Minerva Center for Supramolecular Architectures.

Keywords

Creep rate
Elastic modulus
Gd-doped ceria
Nanoindentation

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10.1016/j.scriptamat.2011.10.027

Cite this

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title = "Influence of Gd content on the room temperature mechanical properties of Gd-doped ceria",

abstract = "High-density ceramics of ceria doped with 0, 3, 5, 10, 15 and 20 mol.% Gd and with grain sizes exceeding 1.5 μm were investigated by nanoindentation. The deduced elastic moduli are independent of Gd content and remain close to the value reported for bulk ceramics (210 ± 5% GPa). All ceramics exhibit transient creep with displacement proportional to the 1/3 power of the time. For 0.05 < x < 0.2, the derived creep magnitude parameter decreases linearly with increasing Gd content. These results strongly suggest that defect rearrangement influences the measurements.",

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note = "Funding Information: I.L. and S.K. wish to thank the US–Israel Binational Science Foundation for funding this research. The research is also made possible in part by the generosity of the Harold Perlman Family. We also acknowledge support of the G.M.J. Schmidt Minerva Center for Supramolecular Architectures.",

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AU - Wachtel, Ellen

AU - Yavo, Nimrod

AU - Lubomirsky, Igor

N1 - Funding Information: I.L. and S.K. wish to thank the US–Israel Binational Science Foundation for funding this research. The research is also made possible in part by the generosity of the Harold Perlman Family. We also acknowledge support of the G.M.J. Schmidt Minerva Center for Supramolecular Architectures.

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Influence of Gd content on the room temperature mechanical properties of Gd-doped ceria

Abstract

Bibliographical note

Keywords

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