Viscoelastic properties of doped-ceria under reduced oxygen partial pressure

Francesca Teocoli, Vincenzo Esposito

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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

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