The effect of process parameters of gas-dynamic spray on generation of brass-type coating structure

Abstract

The study results have shown the effect of coating temperature and contact ratio on generation of phase structure of the coating based on the mixture of Cu and Zn particles and Al2O3 applied by cold gas-dynamic spray method. The x-ray diffraction and micro-spectral analyses have shown the presence of copper and zinc in the structure and generation of electronic compound based on CuZn3 (e – phase) and Cu5Zn (γ – phase), which is preconditioned by copper diffusion into zinc. The mass fraction of intermetallic compositions in the coating structure depends on the coating temperature and contact ratio, it reaches 12% and 33%. The analysis of surface processing by solid and plastic particles flow has shown the effect of copper particles deformation on diffusion rate.