Abstract <p>The paper considers the effect of the duration and temperature of gas-dynamic spraying of a mechanical mixture of Cu, Zn and Al₂O₃ particles on the phase composition of a copper–zinc coating of the “brass” type. It is shown that an increase in the deposition duration at 450°C is accompanied by a significant decrease in the mass fraction of an electron-type solid solution based on Cu₅Zn₈ (γ-phase) from 33.0 to 5.6%, which is due to a significant increase in the size of the substructure of the coherent scattering region from 63.7 to &gt;200 nm for zinc and from 89.8 to &gt;200 nm for copper. An increase in the deposition temperature to 540°C leads to a slight increase in the mass fraction of an electronic type solid solution based on CuZn₃ (ε-phase) from 10.8 to 12.9% and the formation of a new phase—an electronic type solid solution based on CuZn (β'‑phase) with a mass fraction of ≈1%. The magnitude of microdeformations of copper and zinc increases significantly with an increase in the number of spraying cycles at an air flow temperature of 450°C from 0.119 to 0.166% and from 0.004 to 0.056%, respectively. The formation of phases inherent in brasses is accompanied by a slight change in the size of the coherent scattering region in the ε-phase (86.5 and 71.1 nm) and an increase in it in the (γ-phase) from 62.0 to &gt;200 nm and significant microdeformations up to 0.24%.</p>