Nanocomposites and nanomaterials
Complex Method of forming Composite nanostructures of coatings
Stetsko A.E.1
1 Faculty of computer engineering printing, Ukrainian Academy of Printing. Pidgolosko Str., 19, Lviv-79020, Ukraine.
E-mail: andrew73@ukr.net

Structure and properties of surface layers make it an important influence on the performance of products in general. One of the main ways of strengthening steel products are surface diffusion saturation surfaces. Its use is economically more profitable than obtaining alloyed steel with similar properties. Chemical-thermal treatment products can provide a range of performance properties, the achievement of which surround by doping is impossible or economically inefficient.
For machine parts, perspective is a combination of two or more methods of diffusion saturation. Such treatment including special modes enables diffusion hardened surface layers of great hardness and low brittleness that work well in harsh operating conditions [1, 2].
Chemical precipitation is carried out in solutions with the presence of Nickel, which has a very good effect on the morphological features of the reinforced layer. Diffusion saturation  is carried out in retorts with a fusible gate according to special thermal regimes. The obtained hardened layer on the surfaces of machine parts after the Complex hardening method has a large thickness up to 500 μm and substantive hardness (20,000 MPa and above) and wear resistance. The integrated method does not require expensive equipment and highly qualified personnel, which makes it extremely competitive.

1.	Stetsko A.E., Stetsko Y.T. (2020) Formation of Composite Reinforced Coating by Chemical Deposition and Chemical-Thermal Treatment of Boron and Carbon. In: Pogrebnjak A., Bondar O. (eds) Microstructure and Properties of Micro- and Nanoscale Materials, Films, and Coatings (NAP 2019). Springer Proceedings in Physics, vol 240. Springer, Singapore, P.261–270.
2.	Stetsko A.E., Stetsko Y.T. (2021) The Influence of Carbon, Carbon, and Boron on the Formation of Diffusion Nanocomposite Hardened Layers on the Surfaces of Steel Parts. In: Fesenko O., Yatsenko L. (eds) Nanomaterials and Nanocomposites, Nanostructure Surfaces, and Their Applications. Springer Proceedings in Physics, vol 246. Springer, Cham. P. 699-708.