| Publikationstyp: | Beitrag in wissenschaftlicher Zeitschrift |
| Art der Begutachtung: | Peer review (Publikation) |
| Titel: | On the application of focused ion beam nanotomography in characterizing the 3D pore space geometry of Opalinus clay |
| Autor/-in: | Keller, Lukas M. Holzer, Lorenz Wepf, Roger Gasser, Philippe Münch, Beat Marschall, Paul |
| DOI: | 10.1016/j.pce.2011.07.010 |
| Erschienen in: | Physics and Chemistry of the Earth, Parts A/B/C |
| Band(Heft): | 36 |
| Heft: | 17-18 |
| Seite(n): | 1539 |
| Seiten bis: | 1544 |
| Erscheinungsdatum: | 2011 |
| Verlag / Hrsg. Institution: | Elsevier |
| ISSN: | 1474-7065 0079-1946 1873-5193 |
| Sprache: | Englisch |
| Schlagwörter: | Map |
| Fachgebiet (DDC): | 620.11: Werkstoffe |
| Zusammenfassung: | The evaluation and optimization of radioactive disposal systems requires a comprehensive understanding of mass transport processes. Among others, mass transport in porous geomaterials depends crucially on the topology and geometry of the pore space. Thus, understanding the mechanism of mass transport processes ultimately requires a 3D characterization of the pore structure. Here, we demonstrate the potential of focused ion beam nanotomography (FIB-nT) in characterizing the 3D geometry of pore space in clay rocks, i.e. Opalinus clay. In order to preserve the microstructure and to reduce sample preparation artefacts we used high pressure freezing and subsequent freeze drying to prepare the samples. Resolution limitations placed the lower limit in pore radii that can be analyzed by FIB-nT to about 10-15 nm. Image analysis and the calculation of pore size distribution revealed that pores with radii larger than 15 nm are related to a porosity of about 3 vol.%. To validate the method, we compared the pores size distribution obtained by FIB-nT with the one obtained by N2 adsorption analysis. The latter yielded a porosity of about 13 vol.%. This means that FIB-nT can describe around 20-30% of the total pore space. For pore radii larger than 15 nm the pore size distribution obtained by FIB-nT and N2 adsorption analysis were in good agreement. This suggests that FIB-nT can provide representative data on the spatial distribution of pores for pore sizes in the range of about 10-100 nm. Based on the spatial analysis of 3D data we extracted information on the spatial distribution of pore space geometrical properties. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/2201 |
| Volltext Version: | Publizierte Version |
| Lizenz (gemäss Verlagsvertrag): | Lizenz gemäss Verlagsvertrag |
| Departement: | School of Engineering |
| Organisationseinheit: | Institute of Computational Physics (ICP) |
| Enthalten in den Sammlungen: | Publikationen School of Engineering |
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Keller, L. M., Holzer, L., Wepf, R., Gasser, P., Münch, B., & Marschall, P. (2011). On the application of focused ion beam nanotomography in characterizing the 3D pore space geometry of Opalinus clay. Physics and Chemistry of the Earth, Parts A/B/C, 36(17-18), 1539–1544. https://doi.org/10.1016/j.pce.2011.07.010
Keller, L.M. et al. (2011) ‘On the application of focused ion beam nanotomography in characterizing the 3D pore space geometry of Opalinus clay’, Physics and Chemistry of the Earth, Parts A/B/C, 36(17-18), pp. 1539–1544. Available at: https://doi.org/10.1016/j.pce.2011.07.010.
L. M. Keller, L. Holzer, R. Wepf, P. Gasser, B. Münch, and P. Marschall, “On the application of focused ion beam nanotomography in characterizing the 3D pore space geometry of Opalinus clay,” Physics and Chemistry of the Earth, Parts A/B/C, vol. 36, no. 17-18, pp. 1539–1544, 2011, doi: 10.1016/j.pce.2011.07.010.
KELLER, Lukas M., Lorenz HOLZER, Roger WEPF, Philippe GASSER, Beat MÜNCH und Paul MARSCHALL, 2011. On the application of focused ion beam nanotomography in characterizing the 3D pore space geometry of Opalinus clay. Physics and Chemistry of the Earth, Parts A/B/C. 2011. Bd. 36, Nr. 17-18, S. 1539–1544. DOI 10.1016/j.pce.2011.07.010
Keller, Lukas M., Lorenz Holzer, Roger Wepf, Philippe Gasser, Beat Münch, and Paul Marschall. 2011. “On the Application of Focused Ion Beam Nanotomography in Characterizing the 3D Pore Space Geometry of Opalinus Clay.” Physics and Chemistry of the Earth, Parts A/B/C 36 (17-18): 1539–44. https://doi.org/10.1016/j.pce.2011.07.010.
Keller, Lukas M., et al. “On the Application of Focused Ion Beam Nanotomography in Characterizing the 3D Pore Space Geometry of Opalinus Clay.” Physics and Chemistry of the Earth, Parts A/B/C, vol. 36, no. 17-18, 2011, pp. 1539–44, https://doi.org/10.1016/j.pce.2011.07.010.
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