As with other thermal spray processes, cold spray process parameters affect both the process deposition efficiency (DE) and properties of the prepared coatings. Process parameters were found to affect the coating microstructure, resulting in variations in both mechanical and thermal properties. The graphs shows the variation in hardness and elastic modulus of titanium coatings as a function of gas temperature. SOD = standoff distance of the nozzle. PFR = powder feed rate.
Most of the tensile properties of cold-sprayed coatings typically are much better than those obtained with other thermal spray processes. However, the ductility of cold-sprayed coatings in the as-sprayed condition typically is very low due to the extensive work hardening inherent in the deposition process.
Volume 5A, Thermal Spray Technology ⇒ Thermal Spray Processes and Coatings ⇒ Cold Spray Process ⇒ Deposition Efficiency and Coating Properties
