Mesures sur Très Grands Instruments (TGI) |
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In situ Small Angle Scattering of porous materials or composites under pressure The small angle scattering of X-rays or neutrons allows studying mesoscopic structure of materials. In particular, it is possible to monitor in situ changes in the porosity of the materials subjected to mechanical stress. This technique gives information on the size, shape, volume and the surface area of all open and closed pores in a size range of 2 nm to 1 µm. We have developed high pressure cells suitable for small scattering angles. Articles : |
People: Félix Balima Sylvie Le Floch Vittoria Pischedda Franck Legrand Alfonso San Miguel |
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High pressure cell (1500 bar) for Small Angle Neutron Scattering used on Paxe and TPA beamlines at Laboratoire Léon Brillouin (Saclay) and D11 beamline at the Institut Laue Langevin (Grenoble). |
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A diamond anvil cell adapted to SWING beamline at Synchrotron Soleil allowed in situ X-ray scattering up to 5000 bars. |
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Scattering pictures and curves of a porous material collected parallely or perpendicularly to the applied stress allow to model the average pore shape. |
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