Densification and grain growth during sintering of porous Ce0.9Gd0.1O1.95tape cast layers: A comprehensive study on heuristic methods

De Wei Ni, Cristine Grings Schmidt, Francesca Teocoli, Andreas Kaiser, Kjeld Bøhm Andersen, Severine Ramousse, Vincenzo Esposito

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The sintering behavior of porous Ce0.9Gd0.1O1.95(CGO10) tape cast layers was systematically investigated to establish fundamental kinetic parameters associated to densification and grain growth. Densification and grain growth were characterized by a set of different methods to determine the dominant sintering mechanisms and kinetics, both in isothermal and at constant heating rate (iso-rate) conditions. Densification of porous CGO10 tape is thermally activated with typical activation energy which was estimated around 440–470 kJ mol−1. Grain growth showed similar thermal activation energy of ∼427 ± 22 kJ mol−1in the temperature range of 1100–1250ºC. Grain-boundary diffusion was identified to be the dominant mechanism in porous CGO10 tapes. Grain growth and densification mechanism were found strictly related in the investigated temperature range. Porosity acts as a grain growth inhibitor and grain boundary mobility in the porous body was estimated around 10−18–10−16m3N−1s−1 at the investigated temperature range.© 2013 Elsevier Ltd. All rights reserved.

Original languageEnglish
JournalJournal of the European Ceramic Society
Volume33
Issue number13-14
Pages (from-to)2529-2537
ISSN0955-2219
DOIs
Publication statusPublished - 2013

Keywords

  • Sintering
  • Grain growth
  • CeO2
  • Porosity
  • Grain boundary

Cite this

@article{1a825031269a4f669848305d0765a67b,
title = "Densification and grain growth during sintering of porous Ce0.9Gd0.1O1.95tape cast layers: A comprehensive study on heuristic methods",
abstract = "The sintering behavior of porous Ce0.9Gd0.1O1.95(CGO10) tape cast layers was systematically investigated to establish fundamental kinetic parameters associated to densification and grain growth. Densification and grain growth were characterized by a set of different methods to determine the dominant sintering mechanisms and kinetics, both in isothermal and at constant heating rate (iso-rate) conditions. Densification of porous CGO10 tape is thermally activated with typical activation energy which was estimated around 440–470 kJ mol−1. Grain growth showed similar thermal activation energy of ∼427 ± 22 kJ mol−1in the temperature range of 1100–1250ºC. Grain-boundary diffusion was identified to be the dominant mechanism in porous CGO10 tapes. Grain growth and densification mechanism were found strictly related in the investigated temperature range. Porosity acts as a grain growth inhibitor and grain boundary mobility in the porous body was estimated around 10−18–10−16m3N−1s−1 at the investigated temperature range.{\circledC} 2013 Elsevier Ltd. All rights reserved.",
keywords = "Sintering, Grain growth, CeO2, Porosity, Grain boundary",
author = "Ni, {De Wei} and Schmidt, {Cristine Grings} and Francesca Teocoli and Andreas Kaiser and Andersen, {Kjeld B{\o}hm} and Severine Ramousse and Vincenzo Esposito",
year = "2013",
doi = "10.1016/j.jeurceramsoc.2013.03.025",
language = "English",
volume = "33",
pages = "2529--2537",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier",
number = "13-14",

}

Densification and grain growth during sintering of porous Ce0.9Gd0.1O1.95tape cast layers: A comprehensive study on heuristic methods. / Ni, De Wei; Schmidt, Cristine Grings; Teocoli, Francesca; Kaiser, Andreas; Andersen, Kjeld Bøhm; Ramousse, Severine; Esposito, Vincenzo.

In: Journal of the European Ceramic Society, Vol. 33, No. 13-14, 2013, p. 2529-2537.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Densification and grain growth during sintering of porous Ce0.9Gd0.1O1.95tape cast layers: A comprehensive study on heuristic methods

AU - Ni, De Wei

AU - Schmidt, Cristine Grings

AU - Teocoli, Francesca

AU - Kaiser, Andreas

AU - Andersen, Kjeld Bøhm

AU - Ramousse, Severine

AU - Esposito, Vincenzo

PY - 2013

Y1 - 2013

N2 - The sintering behavior of porous Ce0.9Gd0.1O1.95(CGO10) tape cast layers was systematically investigated to establish fundamental kinetic parameters associated to densification and grain growth. Densification and grain growth were characterized by a set of different methods to determine the dominant sintering mechanisms and kinetics, both in isothermal and at constant heating rate (iso-rate) conditions. Densification of porous CGO10 tape is thermally activated with typical activation energy which was estimated around 440–470 kJ mol−1. Grain growth showed similar thermal activation energy of ∼427 ± 22 kJ mol−1in the temperature range of 1100–1250ºC. Grain-boundary diffusion was identified to be the dominant mechanism in porous CGO10 tapes. Grain growth and densification mechanism were found strictly related in the investigated temperature range. Porosity acts as a grain growth inhibitor and grain boundary mobility in the porous body was estimated around 10−18–10−16m3N−1s−1 at the investigated temperature range.© 2013 Elsevier Ltd. All rights reserved.

AB - The sintering behavior of porous Ce0.9Gd0.1O1.95(CGO10) tape cast layers was systematically investigated to establish fundamental kinetic parameters associated to densification and grain growth. Densification and grain growth were characterized by a set of different methods to determine the dominant sintering mechanisms and kinetics, both in isothermal and at constant heating rate (iso-rate) conditions. Densification of porous CGO10 tape is thermally activated with typical activation energy which was estimated around 440–470 kJ mol−1. Grain growth showed similar thermal activation energy of ∼427 ± 22 kJ mol−1in the temperature range of 1100–1250ºC. Grain-boundary diffusion was identified to be the dominant mechanism in porous CGO10 tapes. Grain growth and densification mechanism were found strictly related in the investigated temperature range. Porosity acts as a grain growth inhibitor and grain boundary mobility in the porous body was estimated around 10−18–10−16m3N−1s−1 at the investigated temperature range.© 2013 Elsevier Ltd. All rights reserved.

KW - Sintering

KW - Grain growth

KW - CeO2

KW - Porosity

KW - Grain boundary

U2 - 10.1016/j.jeurceramsoc.2013.03.025

DO - 10.1016/j.jeurceramsoc.2013.03.025

M3 - Journal article

VL - 33

SP - 2529

EP - 2537

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 13-14

ER -