Modeling constrained sintering of bi-layered tubular structures

Tesfaye Tadesse Molla, Dhavanesan Kothanda Ramachandran, De Wei Ni, Vincenzo Esposito, Francesca Teocoli, Eugene A. Olevsky, Rasmus Bjørk, Nini Pryds, Andreas Kaiser, Henrik Lund Frandsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Constrained sintering of tubular bi-layered structures is being used in the development of various technologies. Densification mismatch between the layers making the tubular bi-layer can generate stresses, which may create processing defects. An analytical model is presented to describe the densification and stress developments during sintering of tubular bi-layered samples. The correspondence between linear elastic and linear viscous theories is used as a basis for derivation of the model. The developed model is first verified by finite element simulation for sintering of tubular bi-layer system. Furthermore, the model is validated using densification results from sintering of bi-layered tubular ceramic oxygen membrane based on porous MgO and Ce0.9Gd0.1O1.95-d layers. Model input parameters, such as the shrinkage kinetics and viscous parameters are obtained experimentally using optical dilatometry and thermo-mechanical analysis. Results from the analytical model are found to agree well with finite element simulations as well as measurements from sintering experiment.
Original languageEnglish
JournalJournal of the European Ceramic Society
Volume35
Issue number3
Pages (from-to)941–950
ISSN0955-2219
DOIs
Publication statusPublished - 2015

Keywords

  • Constrained sintering
  • Oxygen membrane
  • Sintering
  • Stress
  • Tubular bi-layer
  • Stresses
  • Bi-layer
  • Oxygen membranes
  • Tubular structures

Cite this

Tadesse Molla, Tesfaye ; Kothanda Ramachandran, Dhavanesan ; Ni, De Wei ; Esposito, Vincenzo ; Teocoli, Francesca ; Olevsky, Eugene A. ; Bjørk, Rasmus ; Pryds, Nini ; Kaiser, Andreas ; Frandsen, Henrik Lund. / Modeling constrained sintering of bi-layered tubular structures. In: Journal of the European Ceramic Society. 2015 ; Vol. 35, No. 3. pp. 941–950.
@article{c14c66ec4d2c41bcac83d640040d1113,
title = "Modeling constrained sintering of bi-layered tubular structures",
abstract = "Constrained sintering of tubular bi-layered structures is being used in the development of various technologies. Densification mismatch between the layers making the tubular bi-layer can generate stresses, which may create processing defects. An analytical model is presented to describe the densification and stress developments during sintering of tubular bi-layered samples. The correspondence between linear elastic and linear viscous theories is used as a basis for derivation of the model. The developed model is first verified by finite element simulation for sintering of tubular bi-layer system. Furthermore, the model is validated using densification results from sintering of bi-layered tubular ceramic oxygen membrane based on porous MgO and Ce0.9Gd0.1O1.95-d layers. Model input parameters, such as the shrinkage kinetics and viscous parameters are obtained experimentally using optical dilatometry and thermo-mechanical analysis. Results from the analytical model are found to agree well with finite element simulations as well as measurements from sintering experiment.",
keywords = "Constrained sintering, Oxygen membrane, Sintering, Stress, Tubular bi-layer, Stresses, Bi-layer, Oxygen membranes, Tubular structures",
author = "{Tadesse Molla}, Tesfaye and {Kothanda Ramachandran}, Dhavanesan and Ni, {De Wei} and Vincenzo Esposito and Francesca Teocoli and Olevsky, {Eugene A.} and Rasmus Bj{\o}rk and Nini Pryds and Andreas Kaiser and Frandsen, {Henrik Lund}",
year = "2015",
doi = "10.1016/j.jeurceramsoc.2014.10.010",
language = "English",
volume = "35",
pages = "941–950",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier",
number = "3",

}

Modeling constrained sintering of bi-layered tubular structures. / Tadesse Molla, Tesfaye; Kothanda Ramachandran, Dhavanesan; Ni, De Wei; Esposito, Vincenzo; Teocoli, Francesca; Olevsky, Eugene A.; Bjørk, Rasmus; Pryds, Nini; Kaiser, Andreas; Frandsen, Henrik Lund.

In: Journal of the European Ceramic Society, Vol. 35, No. 3, 2015, p. 941–950.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Modeling constrained sintering of bi-layered tubular structures

AU - Tadesse Molla, Tesfaye

AU - Kothanda Ramachandran, Dhavanesan

AU - Ni, De Wei

AU - Esposito, Vincenzo

AU - Teocoli, Francesca

AU - Olevsky, Eugene A.

AU - Bjørk, Rasmus

AU - Pryds, Nini

AU - Kaiser, Andreas

AU - Frandsen, Henrik Lund

PY - 2015

Y1 - 2015

N2 - Constrained sintering of tubular bi-layered structures is being used in the development of various technologies. Densification mismatch between the layers making the tubular bi-layer can generate stresses, which may create processing defects. An analytical model is presented to describe the densification and stress developments during sintering of tubular bi-layered samples. The correspondence between linear elastic and linear viscous theories is used as a basis for derivation of the model. The developed model is first verified by finite element simulation for sintering of tubular bi-layer system. Furthermore, the model is validated using densification results from sintering of bi-layered tubular ceramic oxygen membrane based on porous MgO and Ce0.9Gd0.1O1.95-d layers. Model input parameters, such as the shrinkage kinetics and viscous parameters are obtained experimentally using optical dilatometry and thermo-mechanical analysis. Results from the analytical model are found to agree well with finite element simulations as well as measurements from sintering experiment.

AB - Constrained sintering of tubular bi-layered structures is being used in the development of various technologies. Densification mismatch between the layers making the tubular bi-layer can generate stresses, which may create processing defects. An analytical model is presented to describe the densification and stress developments during sintering of tubular bi-layered samples. The correspondence between linear elastic and linear viscous theories is used as a basis for derivation of the model. The developed model is first verified by finite element simulation for sintering of tubular bi-layer system. Furthermore, the model is validated using densification results from sintering of bi-layered tubular ceramic oxygen membrane based on porous MgO and Ce0.9Gd0.1O1.95-d layers. Model input parameters, such as the shrinkage kinetics and viscous parameters are obtained experimentally using optical dilatometry and thermo-mechanical analysis. Results from the analytical model are found to agree well with finite element simulations as well as measurements from sintering experiment.

KW - Constrained sintering

KW - Oxygen membrane

KW - Sintering

KW - Stress

KW - Tubular bi-layer

KW - Stresses

KW - Bi-layer

KW - Oxygen membranes

KW - Tubular structures

U2 - 10.1016/j.jeurceramsoc.2014.10.010

DO - 10.1016/j.jeurceramsoc.2014.10.010

M3 - Journal article

VL - 35

SP - 941

EP - 950

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

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ER -