Abstract:
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 $8\cdot 10^7\le q\le 10^8$ W/m$^2$ 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.
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