| 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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Alfreider, Markus
Montanuniversität Leoben
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Stabilization of mechanical strength in a nanocrystalline CoCrNi concentrated alloy by nitrogen alloying
- 2024Micro-Mechanical Fracture Investigations on Grain Size Tailored Tungsten-Copper Nanocompositescitations
- 2024Automatic and time-resolved determination of fracture characteristics from in situ experimentscitations
- 2023Deformation and failure behavior of nanocrystalline WCucitations
- 2023Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloycitations
- 2023Revealing the nano-scale mechanisms of the limited non-basal plasticity in magnesium
- 2023Nanoscale printed tunable specimen geometry enables high-throughput miniaturized fracture testingcitations
- 2022In situ micromechanical analysis of a nano-crystalline W-Cu compositecitations
- 2022Interface mediated deformation and fracture of an elastic–plastic bimaterial system resolved by in situ transmission scanning electron microscopycitations
- 2022The influence of chemistry on the interface toughness in a WTi-Cu systemcitations
- 2021Prospects of Using Small Scale Testing to Examine Different Deformation Mechanisms in Nanoscale Single Crystals—A Case Study in Mgcitations
- 2021Extracting information from noisy data: strain mapping during dynamic in situ SEM experimentscitations
- 2020Correlation between fracture characteristics and valence electron concentration of sputtered Hf-C-N based thin filmscitations
- 2020In situ fracture observations of distinct interface types within a fully lamellar intermetallic TiAl alloycitations
- 2020Probing defect relaxation in ultra-fine grained Ta using micromechanical spectroscopycitations
- 2019Bioinspired nacre-like alumina with a bulk-metallic glass-forming alloy as a compliant phasecitations
- 2019Rate limiting deformation mechanisms of bcc metals in confined volumescitations
- 2018In-situ elastic-plastic fracture mechanics on the microscale by means of continuous dynamical testingcitations
- 2018In-situ TEM observation of {101¯2} twin-dominated deformation of Mg pillarscitations
- 2017The influence of deformation and proton-irradiation on the mechanical behaviour in nano-crystalline stainless steels
- 2016Synthesis and Mechanical Characterisation of an Ultra-Fine Grained Ti-Mg Compositecitations
Places of action
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article
Correlation between fracture characteristics and valence electron concentration of sputtered Hf-C-N based thin films
Abstract
<p>Hard protective coating materials based on transition metal nitrides and carbides typically suffer from limited fracture tolerance. To further tune these properties non-metal alloying – substituting C with N – has been proven favorable for magnetron sputtered Hf-C-N based thin films. A theoretically predicted increase in valence electron concentration (from 8.0 to 9.0 e/f.u. from Hf[sbnd]C to Hf[sbnd]N) through nitrogen alloying lead to an increase in fracture toughness (K<sub>IC</sub> obtained during in-situ SEM cantilever bending) from 1.89 ± 0.15 to 2.33 ± 0.18 MPa·m<sup>1/2</sup> for Hf<sub>0.43</sub>C<sub>0.57</sub> to Hf<sub>0.35</sub>C<sub>0.30</sub>N<sub>0.35</sub>, respectively. The hardness remains close to the super-hard regime with values of 37.8 ± 2.1 to 39.9 ± 2.7 GPa for these specific compositions. Already the addition of small amounts of nitrogen, while sputtering a ceramic Hf[sbnd]C target, leads to a drastic increase of nitrogen on the non-metallic sublattice for fcc single phased structured HfC<sub>1-x</sub>N<sub>x</sub> films, where x = N/(C + N). The here obtained results also provide experimental proof for the correlation between fracture characteristics and valence electron concentration.</p>