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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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Fikus, Bartosz
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Topics
Publications (4/4 displayed)
- 2020Evaluation the structure transformation of intermetallic feal powder particles in gas detonation spraying process (GDS) to the water
- 2019Dilatometric study of high temperature exposure effects in multiphase Fe-Ai intermetallic/oxide ceramic coating deposited by gas detonation spraying
- 2018Mechanisms of structure formation and thermo-physical properties of gas detonation sprayed Fe-Al type coatingscitations
- 2018Thermal stability of thermophysical properties of multiphase Fe-Al intermetallic/oxide ceramics coatings deposited by gas detonation sprayingcitations
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document
Mechanisms of structure formation and thermo-physical properties of gas detonation sprayed Fe-Al type coatings
Abstract
<p>The paper reports the results of structure examination of intermetallic Fe-AI type coatings obtained by the detonation gun spraying on a C45 plain carbon steel substrate. The structure was analysed with scanning (SEM), transmission (TEM) electron microscopy techniques and electron (SAE) and X-ray diffraction methods as well as quantitative inspection of composition in microareas (EDX). Special attention was paid to the interface between the coating and the substrate analyzing particularly the substructure of the individual grains contained up to 15μm away from the substrate surface layer. The results allowed explaining the formation mechanism of the coating morphology with a contribution of intermetallic phases Fe<sub>3</sub>Al, FeAl, FeAl<sub>2</sub> and Fe<sub>2</sub>Al<sub>5</sub> as well as the e phase taking into consideration the influence of velocity, temperature and pressure on the powder particles during the D-gun spraying. It was established that the coating produced with the DGS method had sublayer morphology of alternate flattened and partially melted grains with wide range of Al content from 39 up to 63 at.%. Partial melting of the individual powder particles brought about the appearance of the amorphous grains and subsequently columnar crystals of the Fe-AI type phases sequentionally formed at the interface area coating and cold substrate surface layer material, which was essential in the mechanism of the Fe- AI coating formation. It was established, that in the area of the polycrystalline dispersive structure formed from the highly plasticized FeAl grains during D-gun spraying, complex oxide films identified as Al<sub>2</sub>O<sub>3</sub>-γ formed, serving as specific composite reinforcement in the intermetallic Fe-AI coating. A mechanism of crystallization of partially melted Fe-AI particle containing nominally 63 at.% Al was carried out in the work in an attempt to explain the formation of different sub-layers within the Fe-AI intermetallic coating at the interface 045 steel surface layer.</p>