Deposition of Brass Coating by a Method of Cold Gas-Dynamic Spraying

The structure and properties of a coating based on a mechanical mixture of Cu and Zn particles deposited on a steel substrate by gas-dynamic spraying are studied. X-ray diffraction and microspectral analysis show a significant effect of the deposition temperature on the content of Cu and Zn in the c...

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Published in:Inorganic materials : applied research 2021-05, Vol.12 (3), p.686-690
Main Authors: Arkhipov, V. E., Muravyova, T. I., Pugachev, M. S., Schcherbakova, O. O.
Format: Article
Language:English
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Summary:The structure and properties of a coating based on a mechanical mixture of Cu and Zn particles deposited on a steel substrate by gas-dynamic spraying are studied. X-ray diffraction and microspectral analysis show a significant effect of the deposition temperature on the content of Cu and Zn in the coating. When the deposition temperature increases from 270 to 450°C, the Zn content increases from 8.15 to 37.6 wt % and the copper content decreases from 91.7 to 62.2 wt %. The results indicate the predominant diffusion of Cu into Zn and the formation of γ- and ε-electron-type Cu 5 Zn 8 and CuZn 3 solid solutions the mass fraction of which at a deposition temperature of 450°C reaches 11.2 and 33%, respectively. With increasing deposition temperature, the substructure of the starting components (Cu, Zn) is crushed from 200 to ~90 and 64 nm, respectively. The size of the coherent-scattering region in the ge phase with increasing air temperature increases from 70 to 97 nm, and that in the γ phase decreases from above 200 to 62.0 nm. Estimates show that the coefficient of diffusion of copper into zinc is ~1.14 ×10 –8 cm 2 /s. The hardness of the deposited Cu–Zn coating reaches 170 HV.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113321030023