| People | Locations | Statistics |
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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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Greer, Al
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Topics
Publications (15/15 displayed)
- 2021Thermal rejuvenation of an aged Au-based metallic glass by fast scanning calorimetrycitations
- 2021Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature.
- 2019Vitrification and nanocrystallization of pure liquid Ni studied using molecular-dynamics simulation.
- 2019Phase separation process preventing thermal embrittlement of a Zr-Cu-Fe-Al bulk metallic glass
- 2019Fast-heating-induced formation of metallic-glass/crystal composites with enhanced plasticity
- 2019High-resolution transmission electron microscopy investigation of diffusion in metallic glass multilayer filmscitations
- 2019Ultrahigh hydrogen-sorbing palladium metallic-glass nanostructurescitations
- 2017In-situ study of athermal reversible photocrystallization in a chalcogenide glasscitations
- 2017The atomistic mechanism of fast relaxation processes in Cu 65 Zr 35 glass
- 2016Fast crystal growth in glass-forming liquids
- 2016Viscosity of liquid Ag-In-Sb-Te: Evidence of a fragile-to-strong crossover.
- 2016Flow-induced elastic anisotropy of metallic glasses
- 2015Fragile-to-Strong Crossover in Supercooled Liquid Ag-In-Sb-Te Studied by Ultrafast Calorimetry
- 2015Rejuvenation of metallic glasses by non-affine thermal strain.
- 2013Investigation of silver diffusion in TiO2/Ag/TiO2 coatingscitations
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article
High-resolution transmission electron microscopy investigation of diffusion in metallic glass multilayer films
Abstract
Lack of plasticity is one of the main disadvantages of metallic glasses. One of the solutions to this problem can be composite materials. Diffusion bonding is promising for composite fabrication. In the present work the diffusion process in glassy multilayer films was investigated. A combination of advanced transmission electron microscopy (TEM)methods and precision sputtering techniques allows visualization and study of diffusion in amorphous metallic layers with high resolution. Multilayered films were obtained by radio frequency sputter deposition of Zr-Cu and Zr-Pd. The multilayers were annealed under a high vacuum (10 −5 Pa)for 1 and 5 h at 400 °C, that is, well below the crystallization temperatures but very close to the glass-transition temperatures of both types of the glassy layer. The structural evolution in the deposited films was investigated by high-resolution transmission electron microscopy. It was observed that, despite the big differences in the atomic mass and size, Pd and Cu have similar diffusion coefficients. Surprisingly, 1 h of annealing results in formation of metastable copper nanocrystals in the Zr-Cu layers which, however, disappear after 5 h of annealing. This effect may be connected with nanovoid formation under a complex stress state evolving upon annealing, and is related to the exceptionally slow relaxation of the glassy layers sealed with a Ta overlayer. ; The authors acknowledge the financial support through the European Research Council under the ERC Advanced Grants INTELHYB (grant ERC-2013-ADG-340025) and ExtendGlass (grant ERC-2015-AdG-695487), the German Science Foundation (DFG) under the grant SO 1518/1-1, and the Ministry of Education and Science of the Russian Federation in the framework of the ‘Increase Competitiveness’ program of NUST ‘MISiS’ (№ К2-2014-013 and К2-2017-089).