Cold Gas Dynamic Spraying
In cold gas dynamic spray a powder particle in the size range of 5-25 m is accelerated to supersonic velocity (500- 1200 m/s) and a coating is formed without melting of the powder. The process can retain the feedstock powder microstructure and it has received widespread attention in spraying oxygen sensitive materials such as Ti, Al and Ni alloys for aerospace and high value manufacturing applications. The CME team has published several high impact papers on fundamental understanding of bonding and particle deformation in cold spray.
A cold sprayed Ti particle onto steel substrate showing jet formation
Top surface morphology of 1 mm thick Ti deposit showing particle jetting
Fracture surface of an aluminium substrate after removing copper coating