The Paton Welding Journal, 2022, №10



2022 №10 (06)

DOI of Article 10.37434/tpwj2022.10.07

2022 №10 (08)

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The Paton Welding Journal, 2022, #10, 42-48 pages

Specialized plasma devices for producing gradient coatings by plasma powder spraying

V.M. Pashchenko

NTUU «Igor Sykorsky Kyiv Polytechnic Institute». 37 Peremohi Ave., 03056, Kyiv, Ukraine. E-mail: vn.paschenko@ukr.net

Abstract
A plasma device for plasma-powder spraying of multilayer, composite and gradient coatings was studied. Experimental studies of energy characteristics of plasma arc generator with curvilinear arc channel were performed at operation in plasma-generating air with the purpose of proving the principal possibility of its long-term service with acceptable energy and life characteristics. It is shown that losses into the plasmatron structure elements depend on arc current and plasma gas flow rate, and the nature of this dependence does not differ in principle from regular plasmatrons: the losses increase with current rise and somewhat decrease at increase of gas flow rate. Volt-ampere characteristics of plasma generator are drooping. However, the presence of arc channel bend as a factor stabilizing the arc length, leads to appearance of a neutral region of VAC with a certain tendency to increase at current rise. Here, the stable operation range is limited by arc current. A variant of improvement of the studied plasmatron design with widening of its functional possibilities of multicomponent coating deposition is given. 8 Ref., 7 Fig.
Keywords: plasma-powder spraying, gradient coatings, multilayer coatings, plasma generator with a curvilinear channel, plasma-generating air, volt-ampere characteristics, efficiencyї, specialized plasma device

Received: 31.08.2022
Accepted: 01.12.2022

References

1. Som, A.I., Galaguz, B.A. (2020) Plasma transferred arc surfacing of composite alloys with separate feed of tungsten carbides and matrix alloy. The Paton Welding J., 12, 34-39. https://doi.org/10.37434/tpwj2020.12.05
2. Borisov, Yu.S., Borisova, A.L., Grishchenko, A.P. et al. (2019) Structure and phase composition of ZrB2-SiC-AlN plasma coatings on the surface of C/C-SiC. The Paton Welding J., 5, 18-27. https://doi.org/10.15407/tpwj2019.05.03
3. Matskerle, Yu. (1987) Modern economy car. Ed. by A.R. Benediktov. Moscow, Mashinostroenie [in Russian].
4. Borisova, A.L., Borisov, Yu.S., Astakhov, E.A. et al. 2012) Heat-protecting properties of thermal spray coatings containing quasi-crystalline alloy of the Al-Cu-Fe system. The Paton Welding J., 4, 31-36.
5. Matsuka, N.P., Gromyka, G.F., Shevtsov, A.I., Iliyushchenko, A.F. (2019) Modeling of nonstationary thermal processes in formation of gradient thermal coatings based on self-fluxing alloy modified with solid refractory compounds under pulsed high-energy action. Minsk, Erugiskie Chteniya-2019, 88–89 [in Russian].
6. Zajtsev, O.V. (2008) Development of materials for protection of aircraft engine parts from high-temperature erosion. In: Syn. of Thesis for Cand. of Tech. Sci. Degree, Dnipropetrovsk [in Ukrainian].
7. Pashchenko, V.M. (2018) Arc generators in surface engineering technologies. Kharkiv, Machulin [in Ukrainian].
8. (2009) Device for formation of gas-powder flow in plasma spraying. Pat. Ukraine 42589. Int. Cl. В05В 7/00, Н05Н 1/00 No. 200901606; fill. 24.02.2009; publ. 10.07.2009 [in Ukrainian].

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Suggested Citation

V.M. Pashchenko (2022) Specialized plasma devices for producing gradient coatings by plasma powder spraying. The Paton Welding J., 10, 42-48.

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