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

Nimrod Yavo; David Noiman; Ellen Wachtel; Sangtae Kim; Yishay (Isai) Feldman; Igor Lubomirsky; Ori Yeheskel

doi:https://doi.org/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, Yishay (Isai) Feldman, Igor Lubomirsky, Ori Yeheskel

Weizmann Institute Of Science

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

Abstract

The Young's, shear and bulk moduli of dense (>95%) Gd-doped ceria (Ce1-xGdx O2-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> 02, may influence the uniaxial and shear moduli, leaving the bulk modulus unaffected. (C) 2016 Elsevier Ltd. All rights reserved.

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

Keywords

Elastic properties
Gd-doped ceria
Porosity
Sound velocity

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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https://doi.org/10.1016/j.scriptamat.2016.05.029

Cite this

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title = "Elastic moduli of pure and gadolinium doped ceria revisited: Sound velocity measurements",

abstract = "The Young's, shear and bulk moduli of dense (>95%) Gd-doped ceria (Ce1-xGdx O2-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> 02, may influence the uniaxial and shear moduli, leaving the bulk modulus unaffected. (C) 2016 Elsevier Ltd. All rights reserved.",

keywords = "Elastic properties, Gd-doped ceria, Porosity, Sound velocity",

author = "Nimrod Yavo and David Noiman and Ellen Wachtel and Sangtae Kim and Feldman, {Yishay (Isai)} and Igor Lubomirsky and Ori Yeheskel",

note = "US-Israel Binational Science Foundation [2012237]",

year = "2016",

month = oct,

day = "1",

doi = "https://doi.org/10.1016/j.scriptamat.2016.05.029",

language = "الإنجليزيّة",

volume = "123",

pages = "86--89",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "American Chemical Society",

}

TY - JOUR

T1 - Elastic moduli of pure and gadolinium doped ceria revisited

T2 - Sound velocity measurements

AU - Yavo, Nimrod

AU - Noiman, David

AU - Wachtel, Ellen

AU - Kim, Sangtae

AU - Feldman, Yishay (Isai)

AU - Lubomirsky, Igor

AU - Yeheskel, Ori

N1 - US-Israel Binational Science Foundation [2012237]

PY - 2016/10/1

Y1 - 2016/10/1

N2 - The Young's, shear and bulk moduli of dense (>95%) Gd-doped ceria (Ce1-xGdx O2-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> 02, may influence the uniaxial and shear moduli, leaving the bulk modulus unaffected. (C) 2016 Elsevier Ltd. All rights reserved.

AB - The Young's, shear and bulk moduli of dense (>95%) Gd-doped ceria (Ce1-xGdx O2-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> 02, may influence the uniaxial and shear moduli, leaving the bulk modulus unaffected. (C) 2016 Elsevier Ltd. All rights reserved.

KW - Elastic properties

KW - Gd-doped ceria

KW - Porosity

KW - Sound velocity

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U2 - https://doi.org/10.1016/j.scriptamat.2016.05.029

DO - https://doi.org/10.1016/j.scriptamat.2016.05.029

M3 - مقالة

SN - 1359-6462

VL - 123

SP - 86

EP - 89

JO - Scripta Materialia

JF - Scripta Materialia

ER -

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

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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