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Sabine Rolland du Roscoat, Andrew King, Armelle Philip, Peter Reischig, Wolfgang Ludwig, Frédéric Flin and Jacques Meyssonnier Analysis of Snow Microstructure by Means of X-Ray Diffraction Contrast Tomography Advanced Engineering Materials 13

Article first published online: 17 DEC 2010 | DOI: 10.1002/adem.201000221

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“Diffraction Contrast Tomography” (DCT) is a new, non-destructive, 3D characterization technique for polycrystalline materials. By combining X-ray absorption and diffraction imaging, it reveals simultaneously the specimen microstructure in terms of grain shape and geometry of the porosity, as well as the crystallographic orientation of individual grains. To understand how snow deforms at the grain scale, DCT scans are performed during compression tests on snow. This provides us with the crystalline orientation of the grains in the initial state and during the deformation, which is essential since ice exhibits a very strong anisotropy in the visco-plastic regime.

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