Automatic Welding, 2023, №02



2023 №02 (03)

DOI of Article 10.37434/as2023.02.04

2023 №02 (05)

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Avtomaticheskaya Svarka (Automatic Welding), #2, 2023, pp. 24-33

Detonation coatings based on TiAl intermetallics with additions of non-metallic refractory compounds

A.L. Borysova, A.I. Kildii, T.V. Tsymbalista, M.A. Vasylkivska

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The results of producing and examination of structure and phase composition of detonation coatings from composite powders (CP) based on TiAl intermetallics and non-metallic refractory compounds (B4C, BN, SiC, Si3N4) are presented. Detonation spraying with CP was carried out using the automatic detonation complex “Perun-S”. As working gases, the mixture “propane- butane-oxygen” and as diluent and transporting gas air were used. CP for detonation spraying was produced by the method of mechanochemical synthesis (MChS) with a subsequent conglomeration. The size of CP particles was 40…80 μm. It was revealed that the main changes in the phase composition of detonation coatings as compared to the original CP consist in the appearance of a large number of oxide phases; in the composition TiAl–B4C – TiO2, Ti3O5; TiAl–BN – Ti3O5, TiO, TiO2; TiAl– SiC–TiO2, Ti3O5, SiO2; TiAl–Si3N4–TiO2, TiO, SiO2. The most dense and homogeneous structure was obtained in the coatings with CP TiAl–SiC і TiAl–Si3N4. 17 Ref., 2 Tabl., 16 Fig.
Keywords: Ti-Al intermetallics, non-metallic refractory compounds, detonation coatings


Received: 9.01.2023

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