The problems of changes in the coating structure depending on the composition of the sprayed mechanical
mixture using copper particles and mixture of copper and zinc particles (" brass") and the effect of structural
factors on the tribological properties of the deposited metal layer are considered. The results of X-ray structural,
phase, chemical and durometric analyzes, as well as tribological testing of coatings are presented. It is found that
structure with hardness of ≈102.7 HV is formed in the coating from mechanical mixture of particles of copper
and aluminum oxide (corundum). Numerous pores are observed in the structure of the deposited metal layer, the
main size of which does not exceed 2 μm. In the coating from mechanical mixture of particles copper, zinc and
aluminum oxide (corundum), structure is formed based on copper with hardness of ≈106.5 HV, zinc — ≈49.7 HV,
intermetallic compounds (γ- and ε-phases) — ≈168.7 HV, the mass fraction of which is 62.0, 7.9 and 24.2 %,
respectively. Both coatings can be used in sliding friction pairs.
The role of
Carica papaya
latex and aluminum oxide on the formation of carbon nanofibre made of coconut shell
