Therefore, to assess the increase in hardness consecutive to the intense plastic deformation related to the cold spray process, hardness measurements were also performed on cross sections of powder particles. The test load and the dwell
time were fixed at 5 gf (49 mN) and 15 s respectively. Measured hardness values are 7373, 9875 and 123714 for the Cu–0.1Ag, Cu–5.7Ag and Cu–23.7Ag respectively