Map Formation for Cold Spray Conditions Based on Particle Kinetic and Rebound Energies

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The cold spray (CS) technique, which can make coatings using solid state metallic fine particles, has many advantages. But, an issue is that the CS technique has not made clear the adhesion mechanism of particles. In the case of approach using CS equipment, it was very difficult to understand the particle adhesion mechanism, because particle diameter has wide variation and uneven-shaped countless particles almost simultaneously impinge on a substrate material. In this study, a cold spray simulated single particle shot system was developed. This system can shoot and make deposition using one spherical particle with fixed shape and diameter. And at the same time, it is possible to accurately evaluate the particle velocity by two laser systems. Using this system, the particle adhesion phenomenon and mechanism on the combination of various materials was evaluated in detail, and a map for cold spray conditions based on particle kinetic and rebound energies was made.