Cold Gas Dynamic Spraying

Cold Gas Dynamic Spraying (CGDS) also known as Cold Spray is an emerging coating deposition process, which is recognised as a complementary technology to well established Thermal Spray processes. In cold spray high pressure gas is utilised to slightly heat up and accelerate the particles to supersonic velocities (400 – 1000 m/s). During impact at the substrates high kinetic energy of particles induces plastic deformation and localized flow of particle and substrate materials. This permit to form well adhered dense coating with unique mechanical, chemical and electrical properties.

Moreover, due to minimised influence of thermally induced stresses in the coating and high deposition efficiency of the process, Cold Spray allows to deliver very thick coatings (several mm) or 3d objects in a cost-effective way.

Number of various materials could be successfully sprayed with Cold Spray, i.e.:

• Pure metals (copper, aluminium, zinc, silver, nickel, niobium, tantalum)

• Alloys (Steels, Ni-alloys, Ti- alloys, MCrAlY’s, )

• Composites (Cu-W, Al-SiC, Al-Al2O3)

 Unique properties of the Cold Sprayed coatings in respect to thermally sprayed, open new range of possible applications, where high purity, low oxide and porosity levels are required.  Bodycote Metallurgical Coatings Limited. has once again proved it’s leading position on the market by being the first industrial spray shop with Cold Spray system in United Kingdom.