Automatic Welding, 2024, №05



2024 №05 (08)

DOI of Article 10.37434/as2024.05.01

2024 №05 (02)

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Avtomaticheskaya Svarka (Automatic Welding), #5, 2024, pp. 3-10

Formation of coatings of the feti-sic system during termal spraying of powder produced by the method of mechanochemical synthesis

N.V. Vigilianska¹, O.M. Burlachenko¹, O.P. Gryshchenko¹, I.O. Koziakov¹, V.F. Gorban²

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: pewinataliya@gmail.com
²Frantsevich Institute for Problems of Materials Science NAS of Ukraine. 3, Omeliana Pritsaka Str., Kyiv, 03142, Ukraine. E-mail: gorban1944@ukr.net

The study of the formation of composite coatings of the FeTi-SiC system, obtained by spraying by thermal spray methods: subsonic (plasma) and supersonic (detonation), was carried out. Composite powder, which was produced by the method of mechanochemical synthesis of ferrotitanium and silicon carbide powder mixture, was used as the feedstock for spraying. Selection of the composition of powder mixture of ferrotitanium and silicon carbide for the process of mechanochemical synthesis was carried out on the basis of thermodynamic calculations of changes in the values of isobaric-isothermal potentials (Gibbs energy) of reactions in the FeTi- SiC system with selection of the reaction whose passage is the most favorable from a thermodynamic point of view. As a result of mechanochemical synthesis, a composite powder of FeTi-(SiC, TiC, Ti5Si3) system with an amorphous-nanocrystalline structure was obtained. Heterogeneous composite coatings consisting of an Fe2Ti metal matrix with uniformly distributed ceramic inclusions of titanium carbide and silicide and oxide components were produced by plasma and detonation spraying methods. By studying the mechanical characteristics, it was established that the produced thermal spray coatings of FeTi-SiC system are classified as materials with a microcrystalline heterophase structure by the type of structural state. The microhardness of the coatings is 8.5 GPa and 8.0 GPa for plasma and detonation coatings, respectively. 23 Ref., 2 Tabl., 9 Fig.
Keywords: mechanochemical synthesis, thermal spray, composite powder, coating, mechanical properties


Received: 26.06.2024
Received in revised form: 01.08.2024
Accepted: 16.10.2024

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