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Microplasma deposition of functional coatings made of mechanically synthesized composite powders of the AlNiCoFeCr equiatomic system
https://doi.org/10.22349/1994-6716-2025-121-1-24-39
Abstract
In the presented work, the approach of solid-phase alloying of a multicomponent system is tested for the first time as applied to an equiatomic mixture of single-phase powders of Al, Ni, Co, Fe and Cr and microplasma spraying of coatings based on them. It is established that in the process of mechanochemical synthesis, a composite powder is formed, which is rounded conglomerates of the “5me” system, with a granulometric distribution from 10 to 110 μm. Studies of the structure and properties of coatings showed the formation of gradients of microhardness and elemental composition, but homogeneity increases with an increase in the duration of mechanosynthesis. In the coatings after 15 minutes of mechanochemical synthesis of the composite powder, Fm3m, Im3m and Pm3m phases are formed, the pores are located along the boundaries of the interweavings (porosity 4.8%), in the distribution of microhardness it was possible to identify two areas with microhardness values of 600 HV and 300 HV (less than 10%) with an average deviation of 7%, adhesion to the steel substrate was 54 MPa.
About the Authors
E. D. Nesterova
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
T. I. Bobkova
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
M. E. Goshkoderya
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
A. A. Kashirina
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
N. V. Yakovleva
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
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Review
For citations:
Nesterova E.D., Bobkova T.I., Goshkoderya M.E., Kashirina A.A., Yakovleva N.V. Microplasma deposition of functional coatings made of mechanically synthesized composite powders of the AlNiCoFeCr equiatomic system. Voprosy Materialovedeniya. 2025;(1(121)):24-39. (In Russ.) https://doi.org/10.22349/1994-6716-2025-121-1-24-39
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