2D digital reconstruction of realistic microstructures of porous? Cermets used in solid oxide fuel cells

Janine Johnson, Qu Jianmin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Accurate modeling of thermal-fluid and mechanical behavior of SOFC electrodes often requires the knowledge of microstructure details of porous cermets such as porous nickel zirconia (Ni-YSZ). An efficient and accurate method is thus needed to recreate such microstructures based on the real material. To that end a digital reconstruction methodology was developed in this paper to create multiple realizations of the material. Based on the statistical features of a digital image of the actual material, the reconstruction method started with an initial random distribution of nickel, YSZ, and pores and iteratively adjusted the pixels to match a given set of statistical features that describe the material. At the end of the reconstruction each realization had the same statistical features as the real material, but may differ probabilistically. These realizations can then be analyzed to study material properties and failure characteristics leading to a correlation between distinct microstructural features and certain material behaviors. This preliminary work reconstructed Ni-YSZ with known analytical functions used to describe overlapping spheres. The importance of different type of statistical descriptors is also discussed and examined.

Original languageEnglish
Title of host publicationAdvances in Solid Oxide Fuel Cells III - A Collection of Papers Presented at the 31st International Conference on Advanced Ceramics and Composites
Pages413-422
Number of pages10
Edition4
StatePublished - 2008
Event31st International Conference on Advanced Ceramics and Composites - Daytona Beach, FL, United States
Duration: 21 Jan 200726 Jan 2007

Publication series

NameCeramic Engineering and Science Proceedings
Number4
Volume28
ISSN (Print)0196-6219

Conference

Conference31st International Conference on Advanced Ceramics and Composites
Country/TerritoryUnited States
CityDaytona Beach, FL
Period21/01/0726/01/07

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