OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 27 No. 3 2025 a characteristic layered structure with clearly defined boundaries between individual sprayed particles (Fig. 3, a). The average size of the structural elements was 10–30 μm, which corresponds to the granulometry of the original powder. The porosity determined by quantitative image analysis did not exceed 0.7±0.1 %, with most of the pores located at the interparticle boundaries. Fig. 3. SEM images of the cross-sectional microstructure of the coatings: a – NiCrBSi (PR-NKh17SR4); b – NiCrBSi (PR-NKh17SR4)+10 wt.% B4C; c – NiCr/WC (VSNGN-85) a b c
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