Developing the modification of nickel cathodes for applying the ion-plasma coatings on the parts of aircraft engines

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.210307

Keywords:

gas-turbine engine, blade, composition, modification, cathode, coating, structure, adhesion, defect, properties

Abstract

This paper reports studying the effect of such highly active, surface-active modifying elements as Y, Hf, and La on the structure and properties of the Ni–Cr–Al system's consumable cathodes, which are used to apply heat-resistant coatings onto the gas-turbine engines' blades. Y, Hf, and La are introduced to form the nanoscale separation of phases that stabilize the alloy structure.

In order to obtain cathodes of the required quality, a method of vacuum-arc autocrucible melting has been chosen. The selected technique makes it possible to use raw materials of different dispersity for the manufacture of ingots (in the form of powders or pig metal). The charge was prepared by shredding the materials mechanically, using various methods (cutting and crushing).

It has been shown that the introduction of elements such as Y and La into the cathodes has a similar effect on structural formation processes. It has been established that when Hf is introduced, the structure of the resulting consumable cathodes is characterized by a greater degree of homogeneity. There is also a positive effect of Hf on the uniformity of the distribution of doping elements (Al, Cr) in the volume of the material compared to alloy samples modified by Y and La.

It has been shown that the introduction of Hf has made it possible to achieve the higher quality indicators in comparison with Y and La. An analysis of coating structure has revealed that samples with Hf have a greater degree of homogeneity and fewer defects, which is especially important when applying coatings of greater thickness (over 40 µm). It has been established that the introduction of Hf makes it possible to apply coatings up to 90 µm thick by obtaining a less defective structure. It has been found that the Hf modification increases the adhesion between the substrate and coating, as well as makes it possible to achieve maximum even distribution of doping elements throughout the entire thickness of the coating applied

Author Biographies

Vladimir Yefanov, Zaporizhzhia Polytechnic National University Zhukovskoho str., 64, Zaporizhzhia, Ukraine, 69063

Postgraduate Student

Department of Welding Technology and Equipment

Oleksandr Ovchynnykov, Zaporizhzhia Polytechnic National University Zhukovskoho str., 64, Zaporizhzhia, Ukraine, 69063

Doctor of Technical Sciences, Professor, Head of Department

Department of Welding Technology and Equipment

Oleksandr Dzhuhan, Zaporizhzhia Polytechnic National University Zhukovskoho str., 64, Zaporizhzhia, Ukraine, 69063

Senior Lecturer

Department of Physical Materials Science

Ihor Petrik, JSC "MOTOR SICH" Motorostroiteley ave., 15, Zaporizhzhia, Ukraine, 69068

PhD, Chief Welder

Dmytro Raspornia, Donetsk Institute for Physics and Engineering named after O.O. Galkin of the National Academy of Sciences of Ukraine Nauki ave., 46, Kyiv, Ukraine, 03680

Senior Researcher

Oleksii Kapustian, Zaporizhzhia Polytechnic National University Zhukovskoho str., 64, Zaporizhzhia, Ukraine, 69063

PhD, Associate Professor

Department of Welding Technology and Equipment

Yehor Saprykin, Berdyansk Engineering College of Zaporizhzhia Polytechnic National University Lia-Seinska str., 59, Berdyansk, Ukraine, 71118

Deputy Director

References

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Published

2020-08-31

How to Cite

Yefanov, V., Ovchynnykov, O., Dzhuhan, O., Petrik, I., Raspornia, D., Kapustian, O., & Saprykin, Y. (2020). Developing the modification of nickel cathodes for applying the ion-plasma coatings on the parts of aircraft engines. Eastern-European Journal of Enterprise Technologies, 4(12 (106), 6–13. https://doi.org/10.15587/1729-4061.2020.210307

Issue

Vol. 4 No. 12 (106) (2020): Materials Science

Section

Materials Science

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Copyright (c) 2020 Vladimir Yefanov, Oleksandr Ovchynnykov, Oleksandr Dzhuhan, Ihor Petrik, Dmytro Raspornia, Oleksii Kapustian, Yehor Saprykin

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