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 journalArticle

22 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)86-89
Number of pages4
JournalScripta Materialia
Volume123
DOIs
Publication statusPublished - Oct 1 2016

Fingerprint

Acoustic variables measurement
Gadolinium
Cerium compounds
Acoustic wave velocity
gadolinium
acoustic velocity
bulk modulus
velocity measurement
Velocity measurement
modulus of elasticity
Elastic moduli
shear
static models
dynamic models
echoes
ultrasonics
ceramics
porosity
defects
oxygen

Keywords

  • Elastic properties
  • Gd-doped ceria
  • Porosity
  • Sound velocity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Elastic moduli of pure and gadolinium doped ceria revisited : Sound velocity measurements. / Yavo, Nimrod; Noiman, David; Wachtel, Ellen; Kim, Sangtae; Feldman, Yishai; Lubomirsky, Igor; Yeheskel, Ori.

In: Scripta Materialia, Vol. 123, 01.10.2016, p. 86-89.

Research output: Contribution to journalArticle

Yavo, Nimrod ; Noiman, David ; Wachtel, Ellen ; Kim, Sangtae ; Feldman, Yishai ; Lubomirsky, Igor ; Yeheskel, Ori. / Elastic moduli of pure and gadolinium doped ceria revisited : Sound velocity measurements. In: Scripta Materialia. 2016 ; Vol. 123. pp. 86-89.
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