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Naji, M. |
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Motta, Antonella |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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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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Kočí, Jan | Prague |
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Azam, Siraj |
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Ospanova, Alyiya |
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Ali, M. A. |
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Rančić, M. |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Śliwiński, Piotr
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Publications (8/8 displayed)
- 2024Electron beam hardening of nanobainitic steelcitations
- 2024Copper Beam Electron Alloying with Ti Powder
- 2022Ni–Cr Powders Modified with Rhenium as a Novel Coating Material—Physical Properties, Microstructure, and Behavior in Plasma Plumecitations
- 2022Electron Beam Surface Hardeningcitations
- 2021Study of microstructure geometry and properties of laser beam welded joints made of S960QL structural steel and S304 corrosion-resistant steelcitations
- 2021Semi-Hybrid CO2 Laser Metal Deposition Method with Inter Substrate Buffer Zonecitations
- 2021Electron Beam Brazing of Austenitic Stainless Steel AISI 304citations
- 2021Electron Beam Melting of Thermally Sprayed Layers – Overview
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article
Ni–Cr Powders Modified with Rhenium as a Novel Coating Material—Physical Properties, Microstructure, and Behavior in Plasma Plume
Abstract
<jats:p>The aim of this work was to develop a new coating material based on Ni20Cr alloy modified with up to 50%wt. rhenium. The modification was carried out by the mechanical mixing of the base powder and ammonium perrhenate with the subsequent thermoreduction in an H2 atmosphere. The obtained powder consists of a nickel–chromium core surrounded by a rhenium shell. The characterization of the powders—including their microstructure, phase and chemical composition, density, flowability, particle size distribution, and specific surface area—was performed. The influence of plasma current intensity and hydrogen gas flow on in-flight particle temperature and velocity were investigated. The results indicate that there is interdiffusion between the base Ni20Cr and the rhenium shell, resulting in intermediary solid solution(s). The modified powders have a higher specific surface area and a lower flowability, but this does not prevent them from being used as feedstock in plasma spraying. In-flight measurements reveal that increasing the content of rhenium allows for the higher temperature of particles, though it also reduces their speed.</jats:p>