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Evaluating Porosity in Cordierite Diesel Particulate Filter Materials, Part 2 Statistical Analysis of Computed Tomography Data

Y. Onel, A. Lange, A. Staude, K. Ehrig, A. Kupsch, M.P. Hentschel, T. Wolk, B.R. Müller, G. Bruno

Journal of Ceramic Science and Technology, Vol. 5, No. 1 (2014), pp. 13-22

DOI: 10.4416/JCST2013-00022

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Abstract

Complementary to Part 1 of this work, the bi-continuous microstructure of porous synthetic cordierite ceramics for filtration applications was investigated using 3D x-ray computed tomography at different resolutions. Applying both Fast Fourier Transform and a newly developed image analysis algorithm, we quantitatively evaluated porosity and pore orientation. The statistical approach allows extraction of spatially resolved or average values. Porosity values based on x-ray absorption agree with mercury intrusion measurements, while pore orientation factors agree with x-ray refraction data (Part 1 of this work), and with published crystallographic texture data.

Keywords

Pore orientation, porous ceramics, computed tomography, 3D microstructure

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