Sintering of Multilayered Porous Structures: Part I-Constitutive Models

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

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Theoretical analyses of shrinkage and distortion kinetics during sintering of bilayered porous structures are carried out. The developed modeling framework is based on the continuum theory of sintering; it enables the direct assessment of the cofiring process outcomes and of the impact of process controlling parameters. The derived “master sintering curve”-type solutions are capable of describing and optimizing the generic sintering shrinkage and distortion kinetics for various material systems. The approach utilizes the material-specific parameters, which define the relative kinetics of layer shrinkages such as the relative intensity of sintering, and employs the conversion between real and specific times of sintering. A novel methodology is also developed for the determination of the ratio of the shear viscosities of the layer’s fully dense materials. This new technique enables the determination of all input parameters necessary for modeling sintering of bilayers using experimental techniques similar to optical dilatometry applied to each individual layer and to a symmetric trilayered porous structure based on the two-layer materials utilized in the bilayered system. Examples of sintering different porous bilayered systems are presented to justify the capability of the model in predicting and optimizing sintering kinetics.
Original languageEnglish
JournalJournal of the American Ceramic Society
Volume96
Issue number8
Pages (from-to)2657–2665
ISSN0002-7820
DOIs
Publication statusPublished - 2013

Cite this

Olevsky, Eugene ; Tadesse Molla, Tesfaye ; Frandsen, Henrik Lund ; Bjørk, Rasmus ; Esposito, Vincenzo ; Ni, De Wei ; Ilyina, Aleksandra ; Pryds, Nini. / Sintering of Multilayered Porous Structures: Part I-Constitutive Models. In: Journal of the American Ceramic Society. 2013 ; Vol. 96, No. 8. pp. 2657–2665.
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title = "Sintering of Multilayered Porous Structures: Part I-Constitutive Models",
abstract = "Theoretical analyses of shrinkage and distortion kinetics during sintering of bilayered porous structures are carried out. The developed modeling framework is based on the continuum theory of sintering; it enables the direct assessment of the cofiring process outcomes and of the impact of process controlling parameters. The derived “master sintering curve”-type solutions are capable of describing and optimizing the generic sintering shrinkage and distortion kinetics for various material systems. The approach utilizes the material-specific parameters, which define the relative kinetics of layer shrinkages such as the relative intensity of sintering, and employs the conversion between real and specific times of sintering. A novel methodology is also developed for the determination of the ratio of the shear viscosities of the layer’s fully dense materials. This new technique enables the determination of all input parameters necessary for modeling sintering of bilayers using experimental techniques similar to optical dilatometry applied to each individual layer and to a symmetric trilayered porous structure based on the two-layer materials utilized in the bilayered system. Examples of sintering different porous bilayered systems are presented to justify the capability of the model in predicting and optimizing sintering kinetics.",
author = "Eugene Olevsky and {Tadesse Molla}, Tesfaye and Frandsen, {Henrik Lund} and Rasmus Bj{\o}rk and Vincenzo Esposito and Ni, {De Wei} and Aleksandra Ilyina and Nini Pryds",
year = "2013",
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pages = "2657–2665",
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Sintering of Multilayered Porous Structures: Part I-Constitutive Models. / Olevsky, Eugene ; Tadesse Molla, Tesfaye; Frandsen, Henrik Lund; Bjørk, Rasmus; Esposito, Vincenzo; Ni, De Wei; Ilyina, Aleksandra ; Pryds, Nini.

In: Journal of the American Ceramic Society, Vol. 96, No. 8, 2013, p. 2657–2665.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Sintering of Multilayered Porous Structures: Part I-Constitutive Models

AU - Olevsky, Eugene

AU - Tadesse Molla, Tesfaye

AU - Frandsen, Henrik Lund

AU - Bjørk, Rasmus

AU - Esposito, Vincenzo

AU - Ni, De Wei

AU - Ilyina, Aleksandra

AU - Pryds, Nini

PY - 2013

Y1 - 2013

N2 - Theoretical analyses of shrinkage and distortion kinetics during sintering of bilayered porous structures are carried out. The developed modeling framework is based on the continuum theory of sintering; it enables the direct assessment of the cofiring process outcomes and of the impact of process controlling parameters. The derived “master sintering curve”-type solutions are capable of describing and optimizing the generic sintering shrinkage and distortion kinetics for various material systems. The approach utilizes the material-specific parameters, which define the relative kinetics of layer shrinkages such as the relative intensity of sintering, and employs the conversion between real and specific times of sintering. A novel methodology is also developed for the determination of the ratio of the shear viscosities of the layer’s fully dense materials. This new technique enables the determination of all input parameters necessary for modeling sintering of bilayers using experimental techniques similar to optical dilatometry applied to each individual layer and to a symmetric trilayered porous structure based on the two-layer materials utilized in the bilayered system. Examples of sintering different porous bilayered systems are presented to justify the capability of the model in predicting and optimizing sintering kinetics.

AB - Theoretical analyses of shrinkage and distortion kinetics during sintering of bilayered porous structures are carried out. The developed modeling framework is based on the continuum theory of sintering; it enables the direct assessment of the cofiring process outcomes and of the impact of process controlling parameters. The derived “master sintering curve”-type solutions are capable of describing and optimizing the generic sintering shrinkage and distortion kinetics for various material systems. The approach utilizes the material-specific parameters, which define the relative kinetics of layer shrinkages such as the relative intensity of sintering, and employs the conversion between real and specific times of sintering. A novel methodology is also developed for the determination of the ratio of the shear viscosities of the layer’s fully dense materials. This new technique enables the determination of all input parameters necessary for modeling sintering of bilayers using experimental techniques similar to optical dilatometry applied to each individual layer and to a symmetric trilayered porous structure based on the two-layer materials utilized in the bilayered system. Examples of sintering different porous bilayered systems are presented to justify the capability of the model in predicting and optimizing sintering kinetics.

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SN - 0002-7820

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