TECHNOLOGY OF PERM TECH RESEARCHERS WILL MAKE METALS FOR AIRCRAFT INDUSTRY STRONGER

26 July 2021 127

— In order to obtain metals and alloys with unique properties, various coating methods are now used. But the use of many of them is limited because there are many factors that stop it: the equipment is expensive, the size of the products is not suitable, the need for mechanical processing after application, high losses of the sprayed material, low efficiency and etc., - says Ivan Ovchinnikov, master degree student of the Mechanical Engineering Faculty of Perm Tech.

Perm researchers suggested using microalloying in conjunction with plasma treatment. In the process, the metal surface is being changed under the "impingement" by the sprayed material. The technology will make it possible to "improve" the characteristics of metals and give them unique properties, minimizing material consumption during spraying. Moreover, the process can be easily automated. In addition, the development can be used for any product size.

The researcher believes that technology will allow to change the surface of metals, increasing their resistance to corrosion and wear resistance. The developers have already conducted a series of studies to determine the rate of destruction of the sprayed material and determined the effectiveness of the process. They established the fraction of material transferred to the substrate and investigated how the distance from the plasma torch to the substrate affects the width of the sprayed tracks. To do this, they compared the processes of plasma processing of copper, aluminum and steel samples. Scientists have found that for copper cathodes, the sputtering process is stable in the current range from 50 to 150 A, and for samples made of steel and aluminum, it is observed only within 50 A. The use of a higher current causes melting. The researchers also found the most effective coating distance to be 5 to 10 mm from the plasma torch to the materials.

Now developers are studying coatings formation and the appearance of the metals unique properties. The researchers will then examine the effect of technological factors on the improved metals. According to the developers, the technology will be promising for being implemented at the enterprises engaged in the mechanical engineering and aerospace industries.

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