Effect of cosintering of anode–electrolyte bilayer on the fabrication of anode-supported solid oxide fuel cells

Jung, Guo-Bin; Wei, Ching-Jun; Su, Ay; Weng, Fang-Bor; Hsu, Yen-Chen; Chan, S. H.

doi:10.1007/s10008-008-0537-z

Cited by 3 publications

(4 citation statements)

References 17 publications

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“…In today's energy efficient technologies, such as membrane and solid oxide fuel cell technologies, it is desirable to reduce the thickness of the individual layers to minimize diffusion resistance and increase the surface areas for better system performance. Sintering samples with such geometries is challenging, as shape instabilities often occur during sintering . Thus, an increased interest in simulating mechanical distortions during co‐sintering of multiple layer systems has arisen.…”

Section: Introductionmentioning

confidence: 99%

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Modeling Sintering of Multilayers Under Influence of Gravity

Frandsen

Olevsky²,

Molla

et al. 2012

J. Am. Ceram. Soc.

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There is a tendency for multiple functional ceramic layers used in various applications to have increasing surface areas and decreasing thicknesses. Sintering samples with such geometry is challenging, as differential shrinkage of the layers causes undesired distortions. In this work, a model, which describes the combined effect of sintering and gravity of thin multilayers, is derived and later compared with experimental results. It allows for consideration of both uniaxial and biaxial stress states. The model is based on the Skorohod‐Olevsky viscous sintering framework, the classical laminate theory and the elastic‐viscoelastic correspondence principle. The modeling approach is then applied to illustrate the effect of gravity during sintering of thin layers of cerium gadolinium oxide (CGO), and it is found to be significant.

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Section: Introductionmentioning

confidence: 99%

“…Sintering samples with such geometries is challenging, as shape instabilities often occur during sintering. [1][2][3][4] Thus, an increased interest in simulating mechanical distortions during co-sintering of multiple layer systems has arisen.…”

Section: Introductionmentioning

confidence: 99%

Modeling Sintering of Multilayers Under Influence of Gravity

Frandsen

Olevsky²,

Molla

et al. 2012

J. Am. Ceram. Soc.

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“…In accordance with the ISI Web of Science™, the total number of refereed publications related directly or indirectly to sintering of multilayered composite structures exceeded 1,500 in 2012. The interest toward this area is driven in particular by the growing demands of understanding of the cofiring process outcomes when sintering laminated ceramic tapes employed in fuel cell components and in multilayered elements of electronic circuitry fabricated by LTCC technology (Low‐Temperature Co‐Fired Ceramics) …”

Section: Introductionmentioning

confidence: 99%

Sintering of Multilayered Porous Structures: Part I‐Constitutive Models

et al. 2013

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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.R. Bordia-contributing editor Manuscript No. 32472.

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“…Figure 1. Geometries of the study domains, for the conventional flat interface (1) and the three alternative wavy interface cases (2,3,4).…”

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confidence: 99%

Sintering shape distortions controlled by interface roughness in powder composites

2016

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The co-sintering of laminar composites is modeled by means of finite element simulations. The densification of an alumina/ceria-stabilized tetragonal zirconia polycrystal bilayer is optimized by substituting the conventional flat interface morphology with a wavy contact surface. The presence of such roughness significantly decreases the undesired macroscopic distortions characterizing multi-material sintering. Various configurations of the wavy interface are numerically reconstructed. The introduction of rough interfaces generates beneficial stress redistribution and constraint relaxation effects, thus reducing the bending of the composite. The obtained results are in good agreement with previously conducted experiments and provide new guidelines to prevent flaw generation.

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Effect of cosintering of anode–electrolyte bilayer on the fabrication of anode-supported solid oxide fuel cells

Cited by 3 publications

References 17 publications

Modeling Sintering of Multilayers Under Influence of Gravity

Modeling Sintering of Multilayers Under Influence of Gravity

Sintering of Multilayered Porous Structures: Part I‐Constitutive Models

Sintering shape distortions controlled by interface roughness in powder composites

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