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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Nivard, Mariette
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Topics
Publications (10/10 displayed)
- 2019Strain rate sensitivity of germanium-selenium glasses
- 2018Strain rate sensitivity of germanium-selenium glasses ; Sensibilité au taux de déformation des verres de chalcogénures au Ge-Se
- 2018Strain rate sensitivity of Ge-Se glasses
- 2018Strain rate sensitivity of germanium-selenium glasses
- 2018A Laser shocked induced densification of silica glass studied by both experience and molecular dynamic simulation.
- 2016Understanding of the mechanical and structural changes induced by alpha particles and heavy ions in the French simulated nuclear waste glasscitations
- 2015Plasticity at nanoindentation site in glass : a possible experimental benchmark for numerical modeling
- 2011Experimental and numerical investigation of plasticity in metallic glasses via reverse analysis
- 2011Size effect in metallic glasses characterized by nanoindentation and shear bands observations
- 2005The laser shock adhesion test (LASAT) for production control of thermally sprayed ceramic coatings
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document
Strain rate sensitivity of Ge-Se glasses
Abstract
International audience ; Chalcogenide glasses are widely used in optical applications either as information carrier or as sensors due to their optical transparency in the mid-infrared window (8-15 µm), high refractive index and non linearity. Glasses from the GexSe1-x system have been extensively studied over the last decades because some of their physical properties do show an anomalous behaviour (Tg, density, band gap, indentation fracture toughness) at certain specific compositions for instance at x=20% also called the percolation threshold. In this work we studied the indentation behaviour of GexSe(1-x) (0≤x≤30) under constant strain rate conditions. Instrumented Berkovich micro indentation were performed at different strain rates (from 10-3 to 10-1 s-1) at ambiante temperature, indentation residual imprints were image by atomic force microscopy. Energies at stake during indentation, strain rate sensitivity (computed from Norton’s law) as well as indentation imprints shape and volumes are discussed as a function of the litterature and glass structure. Experimental results are in good agreement with a similar study based on pure Se glass. From AFM pictures a transition behaviour is identified near the percolation threshold.