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

冷喷涂技术可以利用固态金属微粒制备涂层，具有许多优点。但是，问题是CS技术并没有弄清楚颗粒的附着机理。在使用CS设备的情况下，很难理解颗粒的附着机理，因为颗粒的直径变化很大，形状不均匀的无数颗粒几乎同时撞击到基材上。在本研究中，发展了一套冷雾模拟单粒发射系统。该系统可以用一个形状和直径固定的球形颗粒进行射出和沉积。同时，用两个激光系统可以准确地估计粒子的速度。利用该系统对不同材料组合时的颗粒粘着现象和机理进行了详细的分析，并绘制了基于颗粒动能和反弹能的冷喷涂条件图。

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.