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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
BAM Federal Institute for Materials Research and Testing, D-12200 Berlin, Germany
received August 23, 2013, received in revised form October 18, 2013, accepted November 18, 2013
Vol. 5, No. 1, Pages 13-22 DOI: 10.4416/JCST2013-00022
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.
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Keywords
Pore orientation, porous ceramics, computed tomography, 3D microstructure
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