Automatic Welding, 2023, №10



2023 №10 (07)

DOI of Article 10.37434/as2023.10.08

2023 №10 (01)

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Avtomaticheskaya Svarka (Automatic Welding), #10, 2023, pp. 60-65

Studying the influence of duration of mechanochemical synthesis of nanostructured (Fe, Ti)3 Al powder on characteristics of plasma coatings

O.P. Gryshchenko¹, N.V. Vihilianska¹, O.M. Burlachenko¹, C. Senderowski², V.F. Gorban³

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 University of Technology, Narbutta 85 str. 02-524 Warsaw, Poland
³Institute of Problems of Materials Science. I.M. Fransevich NAS of Ukraine. 3 Academician Krzhizhanovsky, 03142 Kyiv

The impact of duration of high-energy processing of the mixture of 60.8Fe + 39.2TiAl powders (wt. %) on structure, phase composition and mechanical characteristics of plasma intermetallic (Fe,Ti)3Al coatings was studied. As powders, for plasma spraying powders of (Fe,Ti)3Al intermetallic were used, which were produced by the method of mechanochemical synthesis (MChS) in a high-energy mill for 3 and 5 h. As a result of plasma spraying, coatings with a nanocrystalline structure with the size of crystallites of 60 and 45 nm are formed, respectively. It was shown that during spraying of MChS-powder, produced during 5 h, thin-lamellar coatings with a maximum thickness of lamellae of 23 μm are formed, whereas in the case of spraying of MChS-powder produced within 3 h, the thickness of lamellae reaches 42 μm. At the same time, in the case of spraying MChS powder, produced within 5 h, more dense coatings are formed, the porosity of which is reduced by 2.3 % compared to the coating from the MChS-powder, produced within 3 h. It was established that mechanical characteristics (hardness and module of elasticity) of the plasma coating were increased when using a powder produced by processing within 5 h. This allows predicting higher wear resistance of these coatings, operating in the conditions of wear unlike the case of spraying MChS-powder, produced within 3 h. 15 Ref., 3 Tabl., 5 Fig.
Keywords: iron aluminides, mechanochemical synthesis, plasma spraying, nanostructural coatings, crystalline size, mechanical characteristics


Received: 28.06.2023

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