Optimization of the strength of SOFC anode supports

H.L. Frandsen; T. Ramos; A. Faes; Mikko Pihlatie; K. Brodersen

doi:10.1016/j.jeurceramsoc.2011.11.015

Optimization of the strength of SOFC anode supports

H.L. Frandsen (Corresponding Author), T. Ramos, A. Faes, Mikko Pihlatie, K. Brodersen

Research output: Contribution to journal › Article › Scientific › peer-review

47 Citations (Scopus)

Abstract

During operation solid oxide fuel cells are stressed by temperature gradients and various internal and external mechanical loads, which must be withstood. This work deals with the optimization of the strength of as-sintered anode supported half-cells by imposing changes to production parameters, such as powder milling and sintering temperature. The strength was measured with the ball-on-ring method, and analyzed with a large displacement finite element model. Weibull statistics were used to describe the distribution of strengths. The influence on the Weibull strength of the many different processing parameters was found to be quantifiable in terms of cell porosity to a large extent. The results were validated with an independent set of measurements of strength and stiffness by uniaxial tension and the impulse excitation technique, respectively. For application of the finding in relation to the SOFC technology a mathematical frame to determine the optimal porosity of a SOFC system is presented.

Original language	English
Pages (from-to)	1041-1052
Number of pages	12
Journal	Journal of the European Ceramic Society
Volume	32
Issue number	5
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2011.11.015
Publication status	Published - 2012
MoE publication type	A1 Journal article-refereed

Keywords

Strength
fuel sells
sintering
porosity
optimization

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title = "Optimization of the strength of SOFC anode supports",

abstract = "During operation solid oxide fuel cells are stressed by temperature gradients and various internal and external mechanical loads, which must be withstood. This work deals with the optimization of the strength of as-sintered anode supported half-cells by imposing changes to production parameters, such as powder milling and sintering temperature. The strength was measured with the ball-on-ring method, and analyzed with a large displacement finite element model. Weibull statistics were used to describe the distribution of strengths. The influence on the Weibull strength of the many different processing parameters was found to be quantifiable in terms of cell porosity to a large extent. The results were validated with an independent set of measurements of strength and stiffness by uniaxial tension and the impulse excitation technique, respectively. For application of the finding in relation to the SOFC technology a mathematical frame to determine the optimal porosity of a SOFC system is presented.",

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T1 - Optimization of the strength of SOFC anode supports

AU - Frandsen, H.L.

AU - Ramos, T.

AU - Faes, A.

AU - Pihlatie, Mikko

AU - Brodersen, K.

PY - 2012

Y1 - 2012

N2 - During operation solid oxide fuel cells are stressed by temperature gradients and various internal and external mechanical loads, which must be withstood. This work deals with the optimization of the strength of as-sintered anode supported half-cells by imposing changes to production parameters, such as powder milling and sintering temperature. The strength was measured with the ball-on-ring method, and analyzed with a large displacement finite element model. Weibull statistics were used to describe the distribution of strengths. The influence on the Weibull strength of the many different processing parameters was found to be quantifiable in terms of cell porosity to a large extent. The results were validated with an independent set of measurements of strength and stiffness by uniaxial tension and the impulse excitation technique, respectively. For application of the finding in relation to the SOFC technology a mathematical frame to determine the optimal porosity of a SOFC system is presented.

AB - During operation solid oxide fuel cells are stressed by temperature gradients and various internal and external mechanical loads, which must be withstood. This work deals with the optimization of the strength of as-sintered anode supported half-cells by imposing changes to production parameters, such as powder milling and sintering temperature. The strength was measured with the ball-on-ring method, and analyzed with a large displacement finite element model. Weibull statistics were used to describe the distribution of strengths. The influence on the Weibull strength of the many different processing parameters was found to be quantifiable in terms of cell porosity to a large extent. The results were validated with an independent set of measurements of strength and stiffness by uniaxial tension and the impulse excitation technique, respectively. For application of the finding in relation to the SOFC technology a mathematical frame to determine the optimal porosity of a SOFC system is presented.

KW - Strength

KW - fuel sells

KW - sintering

KW - porosity

KW - optimization

U2 - 10.1016/j.jeurceramsoc.2011.11.015

DO - 10.1016/j.jeurceramsoc.2011.11.015

M3 - Article

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JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

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