TY - JOUR A1 - Kupsch, Andreas A1 - Lange, Axel A1 - Hentschel, Manfred P. A1 - Onel, Yener A1 - Wolk, Thomas A1 - Staude, Andreas A1 - Ehrig, Karsten A1 - Müller, Bernd R. A1 - Bruno, Giovanni T1 - Evaluating porosity in cordierite diesel particulate filter materials, part 1 X-ray refraction JF - Journal of ceramic science and technology N2 - Bi-continuous porous ceramics for filtration applications possess a particularly complicated microstructure, with porosity and solid matter being intermingled. Mechanical, thermal, and filtration properties can only be precisely estimated if the morphology of both solid matter and porosity can be quantitatively determined. Using x-ray absorption and refraction, we quantitatively evaluate porosity and pore orientation in cordierite diesel particulate filter ceramics. Porosity values turn out to agree with mercury intrusion measurements, while pore orientation factors agree with published crystallographic texture data. KW - Porous ceramics KW - Pore orientation KW - X-ray refraction KW - Synchrotron KW - Interface PY - 2013 DO - https://doi.org/10.4416/JCST2013-00021 SN - 2190-9385 VL - 4 IS - 4 SP - 169 EP - 176 PB - Göller CY - Baden-Baden AN - OPUS4-29939 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Onel, Yener A1 - Lange, Axel A1 - Staude, Andreas A1 - Ehrig, Karsten A1 - Kupsch, Andreas A1 - Hentschel, Manfred P. A1 - Wolk, Thomas A1 - Müller, Bernd R. A1 - Bruno, Giovanni T1 - Evaluating porosity in cordierite Diesel particulate filter materials, Part 2 statistical analysis of computed tomography data JF - Journal of ceramic science and technology N2 - 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. KW - Pore orientation KW - Porous ceramics KW - Computed tomography KW - 3D microstructure PY - 2013 DO - https://doi.org/10.4416/JCST2013-00022 SN - 2190-9385 VL - 05 IS - 01 SP - 13 EP - 22 PB - Göller CY - Baden-Baden AN - OPUS4-30379 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kupsch, Andreas A1 - Lange, Axel A1 - Hentschel, Manfred P. A1 - Bruno, Giovanni A1 - Onel, Yener A1 - Wolk, Thomas A1 - Staude, Andreas A1 - Ehrig, Karsten A1 - Müller, Bernd R. T1 - Evaluating porosity in cordierite diesel particulate filter materials: advanced X-ray techniques and new statistical analysis methods T2 - ECNDT 2014 - 11th European conference on non-destructive testing (Proceedings) T2 - ECNDT 2014 - 11th European conference on non-destructive testing CY - Prague, Czech Republic DA - 2014-10-06 KW - Porous ceramics KW - Diesel particulate filters KW - Pore orientation KW - X-ray computed tomography KW - X-ray refraction KW - DIVA algorithm KW - Phase contrast KW - Edge artefact KW - Soft matter radiography KW - Wavelet transform KW - Huygens elementary waves PY - 2014 SN - 978-80-214-5018-9 SP - 1 EP - 8(?) AN - OPUS4-31973 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -