Data-fusion of high resolution X-ray CT,SEM and EDS for 3D and pseudo-3D chemical and structural characterization of sandstone |
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| Institution: | 1. The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, , Chinese Academy of Sciences, Shanghai 200050, China;2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;3. Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;4. CAS Center for Excellence in Superconducting Electronics (CENSE), Shanghai 200050, China;1. UGCT/PProGRess, Dept. of Geology, Ghent University, Krijgslaan 281, 9000 Ghent, Belgium;2. UGCT/Radiation Physics, Dept. of Physics & Astronomy, Ghent University, Proeftuinstraat 86, 9000 Ghent, Belgium;1. PProGRess, UGCT, Dept. of Geology and Soil Science, Ghent University, Ghent, Belgium;2. Paul Scherrer Institute, Villigen, Switzerland;3. Radiation Physics Group, UGCT, Dept. of Physics and Astronomy, Ghent University, Ghent, Belgium;4. Dept. of Physics, Norwegian University of Science and Technology, Norway;1. UGCT/PProGRess, Department of Geology and Soil Science, Ghent University, Krijgslaan 281 (S8), 9000 Ghent, Belgium;2. X-Ray Engineering bvba, De Pintelaan 111, 9000 Ghent, Belgium;3. UGCT/Radiation Physics, Department of Physics and Astronomy, Ghent University, Proeftuinstraat 86, 9000 Ghent, Belgium |
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| Abstract: | When dealing with the characterization of the structure and composition of natural stones, problems of representativeness and choice of analysis technique almost always occur. Since feature-sizes are typically spread over the nanometer to centimeter range, there is never one single technique that allows a rapid and complete characterization. Over the last few decades, high resolution X-ray CT (μ-CT) has become an invaluable tool for the 3D characterization of many materials, including natural stones. This technique has many important advantages, but there are also some limitations, including a tradeoff between resolution and sample size and a lack of chemical information. For geologists, this chemical information is of importance for the determination of minerals inside samples. We suggest a workflow for the complete chemical and structural characterization of a representative volume of a heterogeneous geological material. This workflow consists of combining information derived from CT scans at different spatial resolutions with information from scanning electron microscopy and energy-dispersive X-ray spectroscopy. |
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| Keywords: | X-ray tomography μ-CT Scanning electron microscopy Energy-dispersive spectroscopy Data fusion |
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