Plasma treatment of cold-sprayed Ni-Al coating
Chesnokov A.E. 1, Smirnov A.V. 1
1Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Email: chae@itam.nsc.ru

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The results of experiments on plasma jet treatment of cold spray composite coatings Ni-Al are presented. A plasma jet with a heat flux power density in the range of 8· 107≤ q ≤108 W/m2 is sufficient to heat the coating surface to the melting point of aluminum and nickel over the entire coating depth. The formation of an intermetallic compound of the Ni-Al system occurs due to the diffusion of aluminum atoms into the bulk of nickel and due to the dissolution of nickel in the aluminum melt. The resulting coating is a highly porous intermetallic compound with high hardness. Keywords: cold spraying, composite coatings, plasma jet, nickel, aluminum, x-ray phase analysis.
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