Simulation of Solid Particle Impact Behavior for Spray Processes
Simulation of Solid Particle Impact Behavior for Spray Processes
复制标题
DOI：
10.2320/matertrans.47.1697
复制
发表时间：
2006-07
影响因子：
1.2
通讯作者：
K. Yokoyama;M. Watanabe;S. Kuroda;Y. Gotoh;T. Schmidt;F. Gärtner
中科院分区：
文献类型：
--
作者：
K. Yokoyama;M. Watanabe;S. Kuroda;Y. Gotoh;T. Schmidt;F. Gärtner
近年来发展起来的几种热喷涂工艺都具有喷涂温度较低、喷涂粒子速度较高的特点。它们包括冷喷涂、高速氧燃料喷涂和温喷涂，其中大多数或所有喷涂颗粒在撞击到基底表面上时处于固相。因此，为了理解这种方法的涂层形成过程，关于固体颗粒的冲击现象的详细知识是必要的。一般认为，存在一个最小速度，超过这个速度，颗粒就会粘附到基底上，这个速度被称为“临界速度”。临界速度如何取决于各种材料和工艺变量尚未完全了解。在这项研究中，金属颗粒撞击到金属基板上进行了分析，通过使用动态有限元代码（ABAQUS）。研究了衬底温度和粒子温度对临界速度的影响。讨论了热传导对模拟结果的影响。发现临界速度随着1）基底的刚度越高、2）颗粒温度越高和3）颗粒尺寸越大而降低。[doi：10.2320/matertrans.47.1697]
Several thermal spray processes developed recently are characterized by relatively low temperature and higher velocity of sprayed particles. They include cold spray, high velocity oxy-fuel spray, and warm spray, in which majority or all the sprayed particles are in solid phase when impinging onto the substrate surface. Therefore, in order to understand the coating formation process of such processes, detailed knowledge concerning impact phenomena of a solid particle is essential. It is generally accepted that there exists a minimum velocity beyond which a particle adheres to the substrate and this velocity is called the ‘‘critical velocity’’. How the critical velocity depends on various materials and process variables is not fully understood yet. In this study, analysis of a metal particle impacting onto a metal substrate was carried out by using a dynamic finite element code (ABAQUS). Effects of a substrate and a particle temperature on the critical velocity were numerically studied. Also, effects of thermal conduction on the simulation results were discussed. It was found that critical velocity decreases with 1) higher stiffness of the substrate, 2) higher particles temperature, and 3) greater particle size. [doi:10.2320/matertrans.47.1697]