| 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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Rieth, Michael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (58/58 displayed)
- 2024Additive manufacturing of novel complex tungsten components via electron beam melting: Basic properties and evaluation of the high heat flux behavior
- 2024In-Situ synchrotron investigation of elastic and tensile properties of oxide dispersion strengthened EUROFER97 steel for advanced fusion reactorscitations
- 2024Hydrogen diffusion and trapping in a cryogenic processed high-Cr ferrous alloy
- 2024Tungsten alloys R&D program at KIT
- 2023Microstructural insights into EUROFER97 batch 3 steels
- 2023Effect of neutron irradiation on tensile properties of advanced Cu-based alloys and composites developed for fusion applications
- 2022Effect of neutron irradiation on ductility of tungsten foils developed for tungsten-copper laminates
- 2022Effect of neutron irradiation on ductility of tungsten foils developed for tungsten-copper laminatescitations
- 2022Recent progress in the assessment of irradiation effects for in-vessel fusion materials: tungsten and copper alloyscitations
- 2021Microstructure and precipitation behavior of advanced RAFM steels for high-temperature applications on fusion reactorscitations
- 2021Impact of materials technology on the breeding blanket design – Recent progress and case studies in materials technologycitations
- 2021Technological Processes for Steel Applications in Nuclear Fusion
- 2021Additive manufacturing technologies for EUROFER97 components
- 2021Impact of materials technology on the breeding blanket design Recent progress and case studies in materials technologycitations
- 2020Elucidating the microstructure of tungsten composite materials produced by powder injection molding
- 2020The brittle-to-ductile transition in cold-rolled tungsten sheets: the rate-limiting mechanism of plasticity controlling the BDT in ultrafine-grained tungstencitations
- 2020The brittle-to-ductile transition in cold-rolled tungsten sheets: On the loss of room-temperature ductility after annealing and the phenomenon of 45° embrittlementcitations
- 2020The brittle-to-ductile transition in cold-rolled tungsten sheets: On the loss of room-temperature ductility after annealing and the phenomenon of 45° embrittlementcitations
- 2020The brittle-to-ductile transition in cold-rolled tungsten sheets: Contributions of grain and subgrain boundaries to the enhanced ductility after pre-deformation
- 2019Manufacturing, high heat flux testing and post mortem analyses of a W-PIM mock-upcitations
- 2019Long-term stability of the microstructure of austenitic ODS steel rods produced with a carbon-containing process control agent
- 2019Mechanical properties and microstructure characterization of Eurofer97 steel variants in EUROfusion program
- 2019High pulse number thermal shock testing of tungsten alloys produced by powder injection moldingcitations
- 2018Expanding the operation window of RAFM steels by optimized chemical compositions and heat treatments
- 2018Expanding the operation window of RAFM steels by optimized chemical compositions and heat treatments
- 2017Processing of complex near-net-shaped tungsten parts by PIM
- 2017Ductilisation of tungsten (W): Tungsten laminated compositescitations
- 2017Production, microstructure and mechanical properties of two different austenitic ODS steelscitations
- 2017Assessment of industrial nitriding processes for fusion steel applicationscitations
- 2017Plasma exposure of tungsten in the linear plasma device PSI-2 produced via powder injection molding
- 2017Rapid material development and processing of complex near-net-shaped parts by PIM
- 2015Improvement of RAFM steels through thermo-mechanical treatments
- 2015Mechanical and microstructural investigations of tungsten and doped tungsten materials produced via powder injection moldingcitations
- 2014Microstructural anisotropy of ferritic ODS alloys after different production routes
- 2014Virtuelle Material- und Prozessentwicklung am Beispiel der Konstrukturausbildung in Schweißnähten
- 2011Optimization and limitations of known DEMO divertor concepts
- 2011TEM study of mechanically alloyed ODS powder
- 2011Review on the EFDA programme on tungsten materials
- 2011Influence of thickness and notch on impact bending properties of pure tungsten plate material
- 2011Development of high performance materials for nuclear fusion power plants
- 2010Cost effective fabrication of a fail-safe first wall
- 2010Fracture behavior of tungsten materials and the impact on the divertor design in nuclear fusion power plants
- 2010Tungsten materials for structural divertor applications
- 2009Fe-Cr-V ternary alloy-based ferritic steels for high- and low-temperature applications
- 2008Diffusion weld study for test blanket module fabrication
- 2008Impact bending tests on selected tungsten materials
- 2008Fracture behaviour of tungsten materials depending on microstructure and surface fabrication
- 2008Mechanical properties of different refractory materials for nuclear fusion applications
- 2007Specific welds for test blanket modules
- 2005Present development status of EUROFER and ODS-EUROFER for application in blanket concepts
- 2005A steady-state creep model for the AISI 316 L(N) in the technically relevant stress range
- 2005Evaluation of the mechanical properties of W and W-1%La₂O₃ in view of divertor applications
- 2005Creep and recrystallization of pure and dispersion strengthened tungsten
- 2005A comprising steady-state creep model for the austenitic AISI 316 L(N) steel
- 2005Microstructure and mechanical properties of different EUROFER welds
- 2005Assessment of different welding techniques for joining EUROFER blanket components
- 2005Verification and validation experiments for atomistic modeling of FeCr alloys
- 2004Creep of the austenitic steel AISI 316 L(N). Experiments and models
Places of action
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document
Plasma exposure of tungsten in the linear plasma device PSI-2 produced via powder injection molding
Abstract
Tungsten is envisaged as plasma facing material in fusion reactors because of its small tritium retention and low erosion rate as well as its high melting point and high thermal conductivity. However, it is very hard and brittle, which makes it difficult and expensive to fabricate and prone to crack formation under transient heat loads. The first disadvantage can be ameliorated using Powder Injection Molding (PIM) as fabrication route . With its near-net-shape precision the method offers particularly the advantage of cost saving. Furthermore PIM is an ideal tool for scientific investigations andefficient production of new oxide and carbide doped materials. In this contribution, we report on the initial exposure of pure tungsten produced via PIM (sintered at 2400 °C, density 98,6 - 99%, with equiaxed grain orientation) in the linear plasma device PSI-2usingdeuterium and neon plasmas (to enhance physical sputtering) with a moderate plasma flux density of 4x10 21 m-2s-1 to the targets. For the neon plasma exposure, the targets were biased to obtain an ion impact energy of 110 eV and the fluence was 1.6x10 25 m-2, for deuterium to 200 eV at a fluence of 5.2x10 25 m-2, respectively. The sample temperature has been kept to 150 – 200°C during these exposures. In addition, the samples have been exposed to transient heat loads by a Nd:YAG- laser to simulate ELM-likeheat pulses of 0.38 GWm-2 and a duration of 1 ms with a frequency of 0.5 Hz. 1000 pulses have been applied with and without plasma exposure. Reference samples (Plansee W, density > 99.97%, rolled, with a grain elongation perpendicular to the loaded surface and W with density > 99.95%, rolled, grain elongation parallel to the loaded surface) were exposed under the same conditions for comparison. Net erosion has been measured by determination of the mass loss, the surface roughness by laser profilometry and the resulting fuel inventory has been determined by nuclear reaction analysis. The surface morphology has been analyzed prior and after the exposure by secondary electron microscopy. We observe in all cases a slightly enhanced erosion yield of the PIM material to about 10-20%, the response of the material to the transient heat loads is similar in terms of roughness and surface morphology with a larger damage during neon exposure compared to deuterium exposure. The most significant difference between PIM and reference material is observed for the fuel retention which was about a factor of 5 larger for the exposed PIM samples (determined by NRA). A modest porosity observed for the PIM samples could be a possible explanation of this finding.