Improved Modeling Approaches for Constrained Sintering of Bi-Layered Porous Structures

Tesfaye Tadesse Molla, Henrik Lund Frandsen, Vincenzo Esposito, Rasmus Bjørk, De Wei Ni, Eugene Olevsky, Nini Pryds

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Abstract

Shape instabilities during constrained sintering experiment of bi-layer porous and dense cerium gadolinium oxide (CGO) structures have been analyzed. An analytical and a numerical model based on the continuum theory of sintering has been implemented to describe the evolution of bow and densification kinetics in the sintering processes that consists of iso-rate and isothermal phases. The significant influence of weight of the sample (gravity) on the evolution of bow, especially in the isothermal sintering phase, is taken in to account. The modeling predictions indicate good agreement with the results of sintering of a bi-layered cerium-gadolinium oxide system in terms of evolution of bow, porosity and thickness.
Original languageEnglish
Title of host publicationProceedings of PM 2012 - Powder Metallurgy World Congress & Exhibition
Number of pages8
PublisherJapan Powder Metallurgy Association
Publication date2012
Publication statusPublished - 2012
EventPowder Metallurgy World Congress and Exhibition (PM 2012) - Yokohama, Japan
Duration: 14 Oct 201218 Oct 2012

Conference

ConferencePowder Metallurgy World Congress and Exhibition (PM 2012)
CountryJapan
CityYokohama
Period14/10/201218/10/2012

Keywords

  • Sintering
  • Bi-layers
  • Distortion
  • Modeling

Cite this

Tadesse Molla, T., Frandsen, H. L., Esposito, V., Bjørk, R., Ni, D. W., Olevsky, E., & Pryds, N. (2012). Improved Modeling Approaches for Constrained Sintering of Bi-Layered Porous Structures. In Proceedings of PM 2012 - Powder Metallurgy World Congress & Exhibition Japan Powder Metallurgy Association.
Tadesse Molla, Tesfaye ; Frandsen, Henrik Lund ; Esposito, Vincenzo ; Bjørk, Rasmus ; Ni, De Wei ; Olevsky, Eugene ; Pryds, Nini. / Improved Modeling Approaches for Constrained Sintering of Bi-Layered Porous Structures. Proceedings of PM 2012 - Powder Metallurgy World Congress & Exhibition. Japan Powder Metallurgy Association, 2012.
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abstract = "Shape instabilities during constrained sintering experiment of bi-layer porous and dense cerium gadolinium oxide (CGO) structures have been analyzed. An analytical and a numerical model based on the continuum theory of sintering has been implemented to describe the evolution of bow and densification kinetics in the sintering processes that consists of iso-rate and isothermal phases. The significant influence of weight of the sample (gravity) on the evolution of bow, especially in the isothermal sintering phase, is taken in to account. The modeling predictions indicate good agreement with the results of sintering of a bi-layered cerium-gadolinium oxide system in terms of evolution of bow, porosity and thickness.",
keywords = "Sintering, Bi-layers, Distortion, Modeling",
author = "{Tadesse Molla}, Tesfaye and Frandsen, {Henrik Lund} and Vincenzo Esposito and Rasmus Bj{\o}rk and Ni, {De Wei} and Eugene Olevsky and Nini Pryds",
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Tadesse Molla, T, Frandsen, HL, Esposito, V, Bjørk, R, Ni, DW, Olevsky, E & Pryds, N 2012, Improved Modeling Approaches for Constrained Sintering of Bi-Layered Porous Structures. in Proceedings of PM 2012 - Powder Metallurgy World Congress & Exhibition. Japan Powder Metallurgy Association, Powder Metallurgy World Congress and Exhibition (PM 2012), Yokohama, Japan, 14/10/2012.

Improved Modeling Approaches for Constrained Sintering of Bi-Layered Porous Structures. / Tadesse Molla, Tesfaye; Frandsen, Henrik Lund; Esposito, Vincenzo; Bjørk, Rasmus; Ni, De Wei; Olevsky, Eugene ; Pryds, Nini.

Proceedings of PM 2012 - Powder Metallurgy World Congress & Exhibition. Japan Powder Metallurgy Association, 2012.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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T1 - Improved Modeling Approaches for Constrained Sintering of Bi-Layered Porous Structures

AU - Tadesse Molla, Tesfaye

AU - Frandsen, Henrik Lund

AU - Esposito, Vincenzo

AU - Bjørk, Rasmus

AU - Ni, De Wei

AU - Olevsky, Eugene

AU - Pryds, Nini

PY - 2012

Y1 - 2012

N2 - Shape instabilities during constrained sintering experiment of bi-layer porous and dense cerium gadolinium oxide (CGO) structures have been analyzed. An analytical and a numerical model based on the continuum theory of sintering has been implemented to describe the evolution of bow and densification kinetics in the sintering processes that consists of iso-rate and isothermal phases. The significant influence of weight of the sample (gravity) on the evolution of bow, especially in the isothermal sintering phase, is taken in to account. The modeling predictions indicate good agreement with the results of sintering of a bi-layered cerium-gadolinium oxide system in terms of evolution of bow, porosity and thickness.

AB - Shape instabilities during constrained sintering experiment of bi-layer porous and dense cerium gadolinium oxide (CGO) structures have been analyzed. An analytical and a numerical model based on the continuum theory of sintering has been implemented to describe the evolution of bow and densification kinetics in the sintering processes that consists of iso-rate and isothermal phases. The significant influence of weight of the sample (gravity) on the evolution of bow, especially in the isothermal sintering phase, is taken in to account. The modeling predictions indicate good agreement with the results of sintering of a bi-layered cerium-gadolinium oxide system in terms of evolution of bow, porosity and thickness.

KW - Sintering

KW - Bi-layers

KW - Distortion

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M3 - Article in proceedings

BT - Proceedings of PM 2012 - Powder Metallurgy World Congress & Exhibition

PB - Japan Powder Metallurgy Association

ER -

Tadesse Molla T, Frandsen HL, Esposito V, Bjørk R, Ni DW, Olevsky E et al. Improved Modeling Approaches for Constrained Sintering of Bi-Layered Porous Structures. In Proceedings of PM 2012 - Powder Metallurgy World Congress & Exhibition. Japan Powder Metallurgy Association. 2012