| 2026 №04 (06) |
DOI of Article 10.37434/as2026.04.07 |
2026 №04 (01) |
"Avtomatychne Zvaryuvannya" (Automatic Welding), #4, 2026, pp. 65-73
Increase of crack resistance of plasma coatings with addition of nanosized SiO2 particles to the powder composition
V.V. Petrenko
, V.I. Kopylov
National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute».
37 Beresteysky Ave., 03056, Kyiv, Ukraine.
E-mail: petrenkovitaliy8@gmail.comm
A brief review and analysis of the results of research of multiphase plasma-sprayed coatings based on metallic and ceramic powders containing ultrafine components, conducted by the authors, are presented. The influence of introducing nanosized silicon dioxide (SiO2) in the form of Aerosil on the formation of the microstructure and macrostructure of the coatings, as well as on the physical and mechanical properties of the substrate-coating system, has been analyzed. A computational and experimental methodology for assessing the possible initiation and propagation of cracks in coatings is proposed. The methodology includes evaluation of the energy balance during bending tests, which made it possible to determine fracture toughness parameters associated with coating delamination and cracking, and to obtain additional information on the strength characteristics of both the coatings themselves and the composite material as a whole. 14 Ref., 3 Tabl., 2 Fig.
Keywords: plasma coatings, physical and mechanical properties, fracture toughness, nanocomponents, Aerosil, multiphase structure, energy balance
Received: 08.02.2026
Received in revised form: 28.06.2026
Accepted: 20.07.2026
Posted online: 24.07.2026
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