| 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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Polcar, T.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (41/41 displayed)
- 2022Design Guidelines for Two-Dimensional Transition Metal Dichalcogenide Alloyscitations
- 2021Insight into high temperature performance of magnetron sputtered Si-Ta-C-(N) coatings with an ion-implanted interlayercitations
- 2021Fabrication of nanocrystalline supersaturated W–Al alloys with enhanced thermal stability and high sinterabilitycitations
- 2021Effect of substrate bias voltage on the mechanical properties and deformation mechanisms in the nanostructured Ti-22Nb-10Zr coatingcitations
- 2021Investigation on the thermodynamic stability of nanocrystalline W-based alloys: A combined theoretical and experimental approachcitations
- 2021Tribological properties of Mo-S-C coating deposited by pulsed d.c. magnetron sputteringcitations
- 2020The structural evolution of light-ion implanted 6H-SiC single crystal: Comparison of the effect of helium and hydrogencitations
- 2019Microstructural evolution of helium-irradiated 6H–SiC subjected to different irradiation conditions and annealing temperatures: A multiple characterization studycitations
- 2019The role of α″ orthorhombic phase content on the tenacity and fracture toughness behavior of Ti-22Nb-10Zr coating used in the design of long-term medical implantscitations
- 2018Effect of layer thickness on the mechanical behaviour of oxidation-strengthened Zr/Nb nanoscale multilayerscitations
- 2018Development of new β/α″-Ti-Nb-Zr biocompatible coating with low Young's modulus and high toughness for medical applicationscitations
- 2018In situ TEM observations on the structural evolution of a nanocrystalline W-Ti alloy at elevated temperaturescitations
- 2018Effect of layer thickness on the mechanical behavior of oxidation-strengthened Zr/Nb nanoscale multilayerscitations
- 2017Selective oxidation-induced strengthening of Zr/Nb nanoscale multilayerscitations
- 2016Broadband optical absorption caused by plasmonic response of coalesced Au nanoparticles embedded in a TiO2 matrixcitations
- 2016Nanomechanical characterization of alumina coatings grown on FeCrAl alloy by thermal oxidationcitations
- 2015Evolution of the functional properties of titanium–silver thin films for biomedical applications: Influence of in-vacuum annealingcitations
- 2015Friction force microscopy analysis of self-adaptive W-S-C coatings: nanoscale friction and wearcitations
- 2015Structural and mechanical properties of nanocrystalline Zr co-sputtered a-C(:H) amorphous filmscitations
- 2015Protective double-layer coatings prepared by plasma enhanced chemical vapor deposition on tool steelcitations
- 2015Protective double-layer coatings prepared by plasma enhanced chemical vapor deposition on tool steelcitations
- 2015Development of Ag/TiO2NM-treated leathers with antibacterial activity for footwear industry
- 2015Evolution of the functional properties of titanium–silver thin films for biomedical applications: influence of in-vacuum annealingcitations
- 2015Thin films composed of Ag nanoclusters dispersed in TiO2: Influence of composition and thermal annealing on the microstructure and physical responsescitations
- 2015Length-scale-dependent mechanical behaviour of Zr/Nb multilayers as a function of individual layer thicknesscitations
- 2015Biological behaviour of thin films consisting of Au nanoparticles dispersed in a TiO2 dielectric matrixcitations
- 2015The influence of nitrogen and oxygen additions on the thermal characteristics of aluminium-based thin filmscitations
- 2015A high-resolution TEM/EELS study of the effect of doping elements on the sliding mechanisms of sputtered WS2 coatingscitations
- 2015Thin films composed of gold nanoparticles dispersed in a dielectric matrix: the influence of the host matrix on the optical and mechanical responsescitations
- 2015PVD-grown antimicrobial thin films on PVDF substrates for sensors applications
- 2015Tribological properties of self-lubricating TiSiVN coatings at room temperaturecitations
- 2014Adsorption of bovine serum albumin on Zr co-sputtered a-C(:H) films: implication on wear behaviourcitations
- 2014Microstructure and mechanical properties of physical vapor deposited Cu/W nanoscale multilayers: Influence of layer thickness and temperaturecitations
- 2014Tribological behaviour of W-alloyed carbon-based coatings in dry and lubricated sliding contactcitations
- 2014Influence of Zr alloying on the mechanical properties, thermal stability and oxidation resistance of Cr-Al-N coatingscitations
- 2014Frictional properties of self-adaptive chromium doped tungsten-sulfur-carbon coatings at nanoscalecitations
- 2013Effects of Cu on the microstructural and mechanical properties of sputter deposited Ni-Ti thin filmscitations
- 2013Optimum high temperature strength of two-dimensional nanocompositescitations
- 2013Optimum high temperature strength of two-dimensional nanocompositescitations
- 2013High temperature properties of the Cr-Nb-Al-N coatings with increasing Al contentscitations
- 2012Combination of DLC and organosilicon films in protective double layer structure on metallic substrates
Places of action
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article
Selective oxidation-induced strengthening of Zr/Nb nanoscale multilayers
Abstract
The paper presents a new approach, based on controlled oxidation of nanoscale metallic multilayers, to produce strong and hard oxide/metal nanocomposite coatings with high strength and good thermal stability. The approach is demonstrated by performing long term annealing on sputtered Zr/Nb nanoscale metallic multilayers and investigating the evolution of their microstructure and mechanical properties by combining analytical transmission electron microscopy, nano-mechanical tests and finite element models. As-deposited multilayers were annealed at 350 °C in air for times ranging between 1 and 336 h. The elastic modulus increased by ?20% and the hardness by ?42% after 15 h of annealing. Longer annealing times did not lead to changes in hardness, although the elastic modulus increased up to 35% after 336 h. The hcp Zr layers were rapidly transformed into monoclinic ZrO2 (in the first 15 h), while the Nb layers were progressively oxidized, from top surface down towards the substrate, to form an amorphous oxide phase at a much lower rate. The sequential oxidation of Zr and Nb layers was key for the oxidation to take place without rupture of the multi-layered structure and without coating spallation, as the plastic deformation of the metallic Nb layers allowed for the partial relieve of the residual stresses developed as a result of the volumetric expansion of the Zr layers upon oxidation. Moreover, the development of residual stresses induced further changes in mechanical properties in relation to the annealing time, as revealed by finite element simulations.