Numerical modeling of cathode contact material densification

M. A. Khaleel, Brian J. Koeppel, Elizabeth V. Stephens

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Numerical modeling was used to simulate the constrained sintering process of the cathode contact layer during assembly of solid oxide fuel cells (SOFCs). A finite element model based on the continuum theory for sintering of porous bodies was developed and used to investigate candidate low-temperature cathode contact materials. Constitutive parameters for various contact materials under development were estimated from dilatometry screening tests, and the influence of processing time, processing temperature, initial grain size, and applied compressive stress on the free sintering response was predicted for selected candidate materials. The densification behavior and generated stresses within a 5-cell planar SOFC stack during sintering, high temperature operation, and room temperature shutdown were predicted. Insufficient constrained densification was observed in the stack at the proposed heat treatment, but beneficial effects of reduced grain size, compressive stack preload, and reduced thermal expansion coefficient on the contact layer densification and stresses were observed.

Original languageEnglish
Title of host publicationProceedings of the TMS Middle East - Mediterranean Materials Congress on Energy and Infrastructure Systems, MEMA 2015
EditorsIbrahim Karaman, Raymundo Arroyave, Eyad Masad, Eyad Masad
PublisherJohn Wiley and Sons Inc.
Pages295-305
Number of pages11
ISBN (Electronic)9781119065272
DOIs
Publication statusPublished - 1 Jan 2015
EventTMS Middle East - Mediterranean Materials Congress on Energy and Infrastructure Systems, MEMA 2015 - Doha, Qatar
Duration: 11 Jan 201514 Jan 2015

Publication series

NameProceedings of the TMS Middle East - Mediterranean Materials Congress on Energy and Infrastructure Systems, MEMA 2015

Other

OtherTMS Middle East - Mediterranean Materials Congress on Energy and Infrastructure Systems, MEMA 2015
CountryQatar
CityDoha
Period11/1/1514/1/15

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Keywords

  • Cathode
  • Densification
  • Modeling
  • SOFC

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Mechanics of Materials
  • Building and Construction

Cite this

Khaleel, M. A., Koeppel, B. J., & Stephens, E. V. (2015). Numerical modeling of cathode contact material densification. In I. Karaman, R. Arroyave, E. Masad, & E. Masad (Eds.), Proceedings of the TMS Middle East - Mediterranean Materials Congress on Energy and Infrastructure Systems, MEMA 2015 (pp. 295-305). (Proceedings of the TMS Middle East - Mediterranean Materials Congress on Energy and Infrastructure Systems, MEMA 2015). John Wiley and Sons Inc.. https://doi.org/10.1002/9781119090427.ch30