TY - GEN
T1 - 2D digital reconstruction of realistic microstructures of porous? Cermets used in solid oxide fuel cells
AU - Johnson, Janine
AU - Jianmin, Qu
PY - 2008
Y1 - 2008
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:57649149883
SN - 9780470196359
T3 - Ceramic Engineering and Science Proceedings
SP - 413
EP - 422
BT - Advances in Solid Oxide Fuel Cells III - A Collection of Papers Presented at the 31st International Conference on Advanced Ceramics and Composites
T2 - 31st International Conference on Advanced Ceramics and Composites
Y2 - 21 January 2007 through 26 January 2007
ER -