Automatic Welding, 2024, №01



2024 №01 (05)

DOI of Article 10.37434/as2024.01.06

2024 №01 (07)

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Avtomaticheskaya Svarka (Automatic Welding), #1, 2024, pp. 51-59

Thermal spraying of coatings, containing Cr₂AlC max-phase (Review)

N.V. Vihilianska¹, D.V. Filonenko¹, A.O. Yushchenko¹, C. Senderowski², J.-C. Grivel³

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²Warsaw Polytechnic University. 1 Polytechnic Sq., 00-661, Warsaw, Poland
³Technical University of Denmark. Anker Engelunds Vej, Building 301, Kongens Lyngby, Denmark, 2800.

A review of research woks is presented, devoted to formation of coatings, containing Cr2AlC МАХ-phase, under the processes of thermal spraying. The main methods for producing coatings containing Cr2AlC МАХ-phase is plasma, high-velocity oxygen fuel and cold gas-dynamic spraying. As spraying materials, both powders with synthesized Cr2AlC МАХ-phase, obtained by the sintering method as well as powders of the mechanical mixture of initial components are used. To preserve the МАХ-phase in a powder and prevent the oxidation of particles in the process of spraying, high-velocity spraying methods (high-velocity plasma, high-velocity oxygen fuel and cold gas-dynamic) are used. The velocity of particles flight during spraying by these methods is 500…900 m/s. Therefore, in these cases coatings are formed, the phase composition of which corresponds to the phase composition of sprayed powders, and the content of Cr2AlC phase in such coatings amounts to 79…98 wt.%. In the case of using mechanical mixture of components for the course of the synthesis of the МАХ phase, the plasma method is used in the spray process, resulting in the formation of coatings with the contents of the МАХ phase of up to 42 wt. %. Studies of phase transformations in powder particles during spraying, decomposition mechanisms and/or the formation of the МАХ phase, the effects of spraying parameters on the structure and properties of coatings are shown. The prospect of further practical use of thermal coatings, containing Cr2AlC МАХ-phase is described, which mainly consists in using them at elevated temperatures, in particular, in the structures of heat protecting coatings. 39 Ref., 5 Tabl., 8 Fig.
Keywords: Cr2AlC MAX-phase, thermal coatings, microstructure, mechanical properties, heat protection properties


Received: 16.11.2023
Received in revised form: 23.11.2023
Accepted: 14.12.2023

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