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

Weizmann Institute of Science

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

Keywords

Creep rate
Elastic modulus
Gd-doped ceria
Nanoindentation

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2011.10.027

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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.",

keywords = "Creep rate, Elastic modulus, Gd-doped ceria, Nanoindentation",

author = "Roman Korobko and Chen, {Chien Ting} and Sangtae Kim and Cohen, {Sidney R.} and Ellen Wachtel and Nimrod Yavo and Igor Lubomirsky",

note = "US-Israel Binational Science Foundation; G.M.J. Schmidt Minerva Center for Supramolecular ArchitecturesI.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.",

year = "2012",

month = feb,

doi = "10.1016/j.scriptamat.2011.10.027",

language = "الإنجليزيّة",

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journal = "Scripta Materialia",

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AU - Korobko, Roman

AU - Chen, Chien Ting

AU - Kim, Sangtae

AU - Cohen, Sidney R.

AU - Wachtel, Ellen

AU - Yavo, Nimrod

AU - Lubomirsky, Igor

N1 - US-Israel Binational Science Foundation; G.M.J. Schmidt Minerva Center for Supramolecular ArchitecturesI.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.

PY - 2012/2

Y1 - 2012/2

N2 - 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.

AB - 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.

KW - Creep rate

KW - Elastic modulus

KW - Gd-doped ceria

KW - Nanoindentation

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U2 - 10.1016/j.scriptamat.2011.10.027

DO - 10.1016/j.scriptamat.2011.10.027

M3 - مقالة

SN - 1359-6462

VL - 66

SP - 155

EP - 158

JO - Scripta Materialia

JF - Scripta Materialia

IS - 3-4

ER -

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

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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