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

冷喷涂（CS）技术可以利用固态金属微粒制备涂层，具有许多优点。但是，一个问题是CS技术还没有弄清楚颗粒的粘附机制。在使用CS设备的方法的情况下，很难理解颗粒粘附机制，因为颗粒直径具有宽的变化，并且不均匀形状的无数颗粒几乎同时撞击在基板材料上。本研究开发了一套冷喷涂模拟单粒子喷射系统。该系统可以使用一个具有固定形状和直径的球形颗粒进行发射和沉积。同时，可以通过两个激光系统精确地测量颗粒速度。利用该系统，对不同材料组合下的颗粒粘附现象和机理进行了详细的评价，并根据颗粒动能和回弹能绘制了冷喷涂条件图。

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.