Cold gas dynamic spray

Cold Gas Dynamic Spraying (CGDS) is an emerging coating deposition process where high pressure, low temperature gas is utilised to accelerate the coating material particles to supersonic velocities (400 – 1000 m/s), which at impact generate sufficient energy for plastic deformation and cold welding of the coating and substrate materials. This allows efficient deposition of layers with exceptionally low oxide and porosity levels.

Moreover, due to the minimised influence of thermally induced stresses in the coating and the high deposition efficiency of the process, cold spray can deliver very thick coatings (several mm) on complex geometries. A range of materials can be successfully sprayed with cold spray, such as:

• Pure metals (copper, aluminium, zinc, silver, nickel, niobium, tantalum)
• Alloys (Steels, Ni-alloys, Ti- alloys, MCrAlY’s)
• (Cu-W, Al-SiC, Al-Al2O3)