Viscoelastic properties of doped-ceria under reduced oxygen partial pressure

Francesca Teocoli, Vincenzo Esposito

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The viscoelastic properties of gadolinium-doped ceria (CGO) powder compacts are characterized during sintering and cooling under reduced oxygen partial pressure and compared with conventional
sintering in air. Highly defective doped ceria in reducing conditions shows peculiar viscoelastic properties due to fast mass diffusion phenomena activated at low temperatures by Ce4+ to Ce3+ reduction. Particularly, the viscous behavior is affected by dramatic microstructural changes, fast grain growth and densification, which are rapidly completed in the last stage of sintering.
Original languageEnglish
JournalScripta Materialia
Volume75
Pages (from-to)82-85
ISSN1359-6462
DOIs
Publication statusPublished - 2014

Keywords

  • Ceramics
  • Sintering
  • Dynamic mechanical analysis
  • Powder consolidation

Cite this

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title = "Viscoelastic properties of doped-ceria under reduced oxygen partial pressure",
abstract = "The viscoelastic properties of gadolinium-doped ceria (CGO) powder compacts are characterized during sintering and cooling under reduced oxygen partial pressure and compared with conventionalsintering in air. Highly defective doped ceria in reducing conditions shows peculiar viscoelastic properties due to fast mass diffusion phenomena activated at low temperatures by Ce4+ to Ce3+ reduction. Particularly, the viscous behavior is affected by dramatic microstructural changes, fast grain growth and densification, which are rapidly completed in the last stage of sintering.",
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author = "Francesca Teocoli and Vincenzo Esposito",
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language = "English",
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Viscoelastic properties of doped-ceria under reduced oxygen partial pressure. / Teocoli, Francesca; Esposito, Vincenzo.

In: Scripta Materialia, Vol. 75, 2014, p. 82-85.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Viscoelastic properties of doped-ceria under reduced oxygen partial pressure

AU - Teocoli, Francesca

AU - Esposito, Vincenzo

PY - 2014

Y1 - 2014

N2 - The viscoelastic properties of gadolinium-doped ceria (CGO) powder compacts are characterized during sintering and cooling under reduced oxygen partial pressure and compared with conventionalsintering in air. Highly defective doped ceria in reducing conditions shows peculiar viscoelastic properties due to fast mass diffusion phenomena activated at low temperatures by Ce4+ to Ce3+ reduction. Particularly, the viscous behavior is affected by dramatic microstructural changes, fast grain growth and densification, which are rapidly completed in the last stage of sintering.

AB - The viscoelastic properties of gadolinium-doped ceria (CGO) powder compacts are characterized during sintering and cooling under reduced oxygen partial pressure and compared with conventionalsintering in air. Highly defective doped ceria in reducing conditions shows peculiar viscoelastic properties due to fast mass diffusion phenomena activated at low temperatures by Ce4+ to Ce3+ reduction. Particularly, the viscous behavior is affected by dramatic microstructural changes, fast grain growth and densification, which are rapidly completed in the last stage of sintering.

KW - Ceramics

KW - Sintering

KW - Dynamic mechanical analysis

KW - Powder consolidation

U2 - 10.1016/j.scriptamat.2013.11.027

DO - 10.1016/j.scriptamat.2013.11.027

M3 - Journal article

VL - 75

SP - 82

EP - 85

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

ER -