A Feasibility Study of High-Entropy Alloy Coating Deposition by Detonation Spraying Combined with Laser Melting

A Feasibility Study of High-Entropy Alloy Coating Deposition by Detonation Spraying Combined with Laser Melting

In this work, a new two-stage approach to the deposition of high-entropy alloy coatings is proposed. At the first stage, a composite precursor coating is formed by detonation spraying of the metal powder mixtures. At the second stage, the precursor coating is re-melted by a laser, and the formation...

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Bibliographic Details
Published in:Materials Vol. 15; no. 13; p. 4532
Main Authors: Batraev, Igor S., Ulianitsky, Vladimir Yu, Sova, Alexey A., Samodurova, Marina N., Trofimov, Evgeny A., Pashkeev, Kirill Yu, Malikov, Alexander G., Dudina, Dina V., Ukhina, Arina V.
Format: Journal Article
Language:English
Published: Basel MDPI AG 27-06-2022
MDPI
Subjects:
Alloys
Aluminum
Coatings
Copper
Deposition
Detonation
Engineering Sciences
Experiments
Feasibility studies
High entropy alloys
Intermetallic compounds
Laser beam melting
Lasers
Metal powders
Mixtures
Morphology
Powder spraying
Precursors
Scanning electron microscopy
Solid solutions
Solidification
Structural analysis
Germany
composite coating
laser melting
detonation spraying
high-entropy alloy
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Summary:In this work, a new two-stage approach to the deposition of high-entropy alloy coatings is proposed. At the first stage, a composite precursor coating is formed by detonation spraying of the metal powder mixtures. At the second stage, the precursor coating is re-melted by a laser, and the formation of multi-component solid solution phases can be expected upon solidification. The feasibility of the proposed approach was validated using three different mixtures of Fe, Ni, Cu, Co and Al powders. It was shown that detonation spraying allows forming composite coatings with a uniform distribution of the lamellae of different metals. The results of the structural analysis of the laser-treated coatings suggest that complete alloying occurred in the melt and face-centered cubic solid solutions formed in the coatings upon cooling.
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content type line 23
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15134532