| 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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Mitterer, Christian
Montanuniversität Leoben
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (28/28 displayed)
- 2024Enhancement of copper nanoparticle yield in magnetron sputter inert gas condensation by applying substrate bias voltage and its influence on thin film morphologycitations
- 2024Short-Time Magnetron Sputtering for the Development of Carbon–Palladium Nanocomposites
- 2023Improved thermolytic dehydrogenation of LiBH4 nanoconfined in few-layer graphene with different functionalitiescitations
- 2023Parameters influencing the fracture of Mo films and their wider significancecitations
- 2023Synergistic enhancement of hydrogen interactions in palladium–silicon–gold metallic glass with multilayered graphenecitations
- 2023Synergistic enhancement of hydrogen interactions in palladium-gold-silicon metallic glass on multilayered graphenecitations
- 2022Impact of Si on the high-temperature oxidation of AlCr(Si)N coatingscitations
- 2022Determination of Cooling Rate and Temperature Gradient during Formation of Cathode Spot Craters in a Vacuum Arccitations
- 2022Magnetron Sputtered Non‐Toxic and Precious Element‐Free TiZrGe Metallic Glass Nanofilms with Enhanced Biocorrosion Resistancecitations
- 2022Precipitation-based grain boundary design alters Inter- to Trans-granular Fracture in AlCrN Thin Filmscitations
- 2021Rapid solidification and metastable phase formation during surface modifications of composite Al-Cr cathodes exposed to cathodic arc plasmacitations
- 2021Synthesis of bulk reactive Ni–Al composites using high pressure torsioncitations
- 2020Effect of Pt nanoparticle decoration on the H2 storage performance of plasma-derived nanoporous graphenecitations
- 2020Influence of spinodal decomposition and fcc→w phase transformation on global and local mechanical properties of nanolamellar CVD fcc-Ti1-xAlxN coatingscitations
- 2020Stress relaxation through thermal crack formation in CVD TiCN coatings grown on WC-Co with different Co contentscitations
- 2020Nanoscale stress distributions and microstructural changes at scratch track cross-sections of a deformed brittle-ductile CrN-Cr bilayercitations
- 2020Evolution of stress fields during crack growth and arrest in a brittle-ductile CrN-Cr clamped-cantilever analysed by X-ray nanodiffraction and modellingcitations
- 2019Anisotropy of fracture toughness in nanostructured ceramics controlled by grain boundary designcitations
- 2019Thermal stability of nanolamellar fcc-Ti1-xAlxN grown by chemical vapor depositioncitations
- 2019Stress-controlled decomposition routes in cubic AlCrN films assessed by in-situ high-temperature high-energy grazing incidence transmission X-ray diffractioncitations
- 2018Novel combustion synthesis of carbon foam‑aluminum fluoride nanocomposite materialscitations
- 2018Needle grass array of nanostructured nickel cobalt sulfide electrode for clean energy generationcitations
- 2017Solvothermal synthesis, nanostructural characterization and gas cryo-adsorption studies in a metal-organic framework (IRMOF-1) materialcitations
- 2016In-situ Observation of Cross-Sectional Microstructural Changes and Stress Distributions in Fracturing TiN Thin Film during Nanoindentationcitations
- 2016Hierarchical Architectures to Enhance Structural and Functional Properties of Brittle Materialscitations
- 2016Cross-sectional structure-property relationship in a graded nanocrystalline Ti1-xAlxN thin filmcitations
- 2014Mono-textured nanocrystalline thin films with pronounced stress-gradientscitations
- 2007Tribological properties of nanocomposite CrC x /a-C:H thin filmscitations
Places of action
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article
Determination of Cooling Rate and Temperature Gradient during Formation of Cathode Spot Craters in a Vacuum Arc
Abstract
Due to the extreme thermal conditions and short lifetimes, experimental exploration of cathode spots in vacuum arcs is very difficult. The intensive heat in the cathode spot is believed to be generated by ion bombardment and by Joule heating. However, thermal conditions occurring inside the re-melted material in craters created by cathode spots are not accurately known. During the exposure to cathodic arc plasmas, an Al-Cr cathode’s surface was locally melted by successive ignition and extinction of cathode spots. The melted layer, that quickly solidified, was characterized by the formation of several thin layers with a thickness of a few micrometers that were stacked on top of each other. The corresponding solidification patterns displayed cellular and dendritic microstructures. A phase field-based model was used to simulate and determine the thermal process conditions that led to the dendritic structures observed within the re-melted layer. Different combinations of cooling rates and temperature gradients were numerical explored to determine the most probable thermal conditions under which the cathode material re-solidifies. The results showed that the material in the vicinity of the cathode spot crater re-solidified under the condition of a cooling rate of about 3 × 105 K/s and a temperature gradient of about 6 × 107 K/m. These results constitute valuable data for the validation of numerical models dedicated to cathode spot formation.