Elemental electron energy loss mapping of a precipitate in a multi-component aluminium alloy |
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| Institution: | 1. Department of Physics, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway;2. Gatan Inc., 5794 W Las Positas Blvd, Pleasanton, CA 94588, USA;3. SINTEF Materials and Chemistry, N-7465 Trondheim, Norway;1. Technische Universität Darmstadt, Department of Geo- and Material Science, 64287, Darmstadt, Germany;2. Department of Chemistry, Institute of New Energy, Fudan University, Shanghai, 200433, People''s Republic of China;3. Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), 76344 Eggenstein-Leopoldshafen, Germany;4. Robert Bosch GmbH, Corporate Research and Advance Engineering, 70839, Gerlingen, Germany;1. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;2. Buildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;3. Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, TN 37235, USA;4. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;1. Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Tokyo 152-8552, Japan;2. SINTEF Materials and Chemistry, N-7465 Trondheim, Norway;3. Faculty of Physics, Norwegian University of Science and Technology, N-7491 Trondheim, Norway;4. Precision and Intelligence Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan;1. Center for High-Resolution Electron Microscopy, College of Materials Science & Engineering, Hunan University, Changsha, 410082, China;2. Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2. School of Materials Science and Engineering, Jiangsu Province Key Laboratory of Materials Tribology, Jiangsu University, Zhenjiang 212013, China;3. College of Physics, Chongqing University, Chongqing 400044, China |
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| Abstract: | The elemental distribution of a precipitate cross section, situated in a lean Al-Mg-Si-Cu-Ag-Ge alloy, has been investigated in detail by electron energy loss spectroscopy (EELS) and aberration corrected high angle annular dark field scanning transmission electron microscopy (HAADF-STEM). A correlative analysis of the EELS data is connected to the results and discussed in detail. The energy loss maps for all relevant elements were recorded simultaneously. The good spatial resolution allows elemental distribution to be evaluated, such as by correlation functions, in addition to being compared with the HAADF image.The fcc-Al lattice and the hexagonal Si-network within the precipitates were resolved by EELS. The combination of EELS and HAADF-STEM demonstrated that some atomic columns consist of mixed elements, a result that would be very uncertain based on one of the techniques alone. EELS elemental mapping combined with a correlative analysis have great potential for identification and quantification of small amounts of elements at the atomic scale. |
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| Keywords: | Al-Mg-Si alloy HAADF-STEM EELS Precipitation Si-network |
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