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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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Şopu, D.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2022Maximizing the degree of rejuvenation in metallic glassescitations
- 2021From elastic excitations to macroscopic plasticity in metallic glassescitations
- 2020Chemical bonding effects on the brittle-to-ductile transition in metallic glassescitations
- 2020Atomic-scale origin of shear band multiplication in heterogeneous metallic glassescitations
- 2019Modulating heterogeneity and plasticity in bulk metallic glasses: Role of interfaces on shear bandingcitations
- 2019Tuning the glass forming ability and mechanical properties of Ti-based bulk metallic glasses by Ga additionscitations
- 2019Structure-Property relationships in shape memory metallic glass compositescitations
- 2019High-resolution transmission electron microscopy investigation of diffusion in metallic glass multilayer filmscitations
- 2018Metallic glass nanolaminates with shape memory alloyscitations
- 2018Ductile bulk metallic glass by controlling structural heterogeneities
- 2018Ductile bulk metallic glass by controlling structural heterogeneitiescitations
- 2017β-type Ti-based bulk metallic glass composites with tailored structural metastabilitycitations
- 2016Brittle-to-ductile transition in metallic glass nanowirescitations
- 2015Deformation behavior of metallic glass composites reinforced with shape memory nanowires studied via molecular dynamics simulationscitations
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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).