Concept feasibility study of using dual-stream jets in cold spray

Cold sprayed coatings can be the most effective means of protecting substrate surfaces from wear and corrosion. These are processes in which spray particles are deposited via supersonic velocity impact at a temperature lower than the melting point of the spray material. The particle acceleration and the heat transfer directly determine whether particles have sufficient energy to deposit and form the coating. Whereas many cold spray facilities use high-speed single jets for accelerating the particles, it is of interest to consider the advantages and drawbacks of an alternative dual-stream jet configuration.