Abstract
In cold spray, even when the initial properties are
within the critical values for deposition, the multi-impact
process is much more complex to ensure a 100% deposition. In
inelastic impact, part of the initial kinetic energy of the particles
at impact is lost through plastic deformation. After impact and
subsequent restitution, unbounded particles will be ejected
through rebound forces or material jetting at erosion.
Observation of the final kinetic energies achieved in the
particles after impact was used as criteria for a rough estimate
of the coating process. The surface roughness increased with
reduced deposition efficiency. The interface roughness was less
affected by this process. Qualitative comparison to experimental
results shows some closer correlations with some of the surfaces
of experimentally obtained surfaces in cold spray. This could
provide some of the answers to the underlying mechanisms in
which the cold spray surfaces are generated.