| 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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Molina-Aldareguia, Jon M.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Fracture resistance of binderless tungsten carbide consolidated by spark plasma sintering and flash sinteringcitations
- 2023Room temperature stability, structure and mechanical properties of cubic tungsten carbide in flash sintered productscitations
- 2023Does flash sintering alter the deformation mechanisms of tungsten carbide?citations
- 2023Role of surface carbon nanolayer on the activation of flash sintering in tungsten carbidecitations
- 2022Selective Metal Ion Irradiation Using Bipolar HIPIMS: A New Route to Tailor Film Nanostructure and the Resulting Mechanical Propertiescitations
- 2021High temperature in situ SEM assessment followed by ex situ AFM and EBSD investigation of the nucleation and early growth stages of Fe-Al intermetallicscitations
- 2018Single-imprint moth-eye anti-reflective and self-cleaning film with enhanced resistancecitations
- 2016A 3D dislocation dynamics analysis of the size effect on the strength of [111] LiF micropillars at 300K and 600Kcitations
- 2016Comparison of push-in and push-out tests for measuring interfacial shear strength in nano-reinforced composite materialscitations
- 2015A study of composite laminates failure using an anisotropic gradient-enhanced damage mean-field homogenization modelcitations
- 2015An XFEM/CZM implementation for massively parallel simulations of composites fracturecitations
- 2014Understanding size effects on the strength of single crystals through high-temperature micropillar compressioncitations
- 2014Mechanical behavior of nanoscale multilayers Prefacecitations
- 2013Superplastic deformation of directionally solidified nanofibrillar Al2O3-Y3Al5O12-ZrO2 eutecticscitations
- 2012Influence of Plasma Surface Treatments on Kink Band Formation in PBO Fibers During Compressioncitations
- 2011An experimental and numerical study of the influence of local effects on the application of the fibre push-in testcitations
- 2010Effect of fiber, matrix and interface properties on the in-plane shear deformation of carbon-fiber reinforced compositescitations
- 2010Thermomechanical Properties of Copper-Carbon Nanofibre Composites Prepared by Spark Plasma Sintering and Hot Pressingcitations
Places of action
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article
Selective Metal Ion Irradiation Using Bipolar HIPIMS: A New Route to Tailor Film Nanostructure and the Resulting Mechanical Properties
Abstract
<jats:p>This manuscript introduces and experimentally demonstrates a novel concept of selective metal ion irradiation by combining bipolar HIPIMS with conventional DC magnetron sputtering operation and simple DC biasing. The addition of the positive pulse to a conventional HIPIMS discharge accelerates the predominantly metal ions created during the negative HIPIMS phase with an energy proportional to the positive pulse amplitude and ionization state. Two distinct metal elements with large difference in atomic mass (Cr and Nb) are used on this work to irradiate a TiAlN matrix which is being deposited by conventional DCMS. The positive acceleration voltages used for both Cr and Nb discharges were varied between 0 to +200 V to analyze the influence of Nb and Cr metal ion irradiation on the mechanical and microstructural properties of TiAlN films. Even though the total metal ion incorporation into the TiAlN matrix for both Cr and Nb is less than 10% at%, strong effects are observed on the resulting film properties. It was observed that use of the lighter metal ion Cr is more beneficial than the heavier metal ion Nb. The Cr bombardment allows a hardness improvement from 7 to 22 GPa as well as a reduced film accumulated stress at the highest positive acceleration voltage. From the XRD measurements it is observed that the Cr atoms are inserted into the TiAlN cubic matrix maintaining its crystalline structure. However, the bombardment with the high-mass metal ion (Nb) promotes the deformation of the cubic TiAlN matrix, resulting in a spinodal decomposition and further degradation of the crystalline structure with the appearance of the hexagonal wurtzite-type Al-rich phase. This is also translated to the resulting film mechanical properties, as hardness rapidly decreases from 25 to 10 GPa and stress increases linearly with the positive voltage acceleration.</jats:p>