Development of a method for in-situ determination of deposition efficiency in thermal spraying

粒子诊断技术在热喷涂领域有着广泛的应用。它们通过原位确定自由射流中颗粒的状态变量来实现过程监控。通过监测和限制颗粒状态变量的波动，可以实现制造的涂层的质量保证。然而，原位确定的沉积速率和沉积效率的基础上的状态变量的颗粒在自由射流是不是最先进的。本项目的目的是开发一种方法，这将使原位确定的整体颗粒的质量流率。沉积速率和沉积效率的原位测定将通过测量撞击在衬底上的颗粒和从衬底反弹的颗粒的质量流率来实现。为了实现这一点，有能力确定颗粒速度和尺寸的颗粒诊断系统是必要的。在本项目的框架内，HiWatch Compact系统将用于此目的。

Particle diagnostics are widely used in the field of thermal spraying. They enable process monitoring through in-situ determination of the state variables of particles in free jet. Through the monitoring and limiting the fluctuations of the state variables of the particles, it is possible to achieve quality assurance of the manufactured coatings. Nevertheless, in-situ determination of the deposition rate and the deposition efficiency based on the state variables of the particles in free jet is not state of the art. The aim of this project is the development of a methodology that will enable the in-situ determination of the holistic particle mass flow rate. The in-situ determination of the deposition rate and the deposition efficiency will be realized by measuring the mass flow rate of the particles that impinge on the substrate and the particles that rebound off the substrate. In order to achieve this, a particle diagnostics system with the ability to determine the particle velocities and sizes is necessary. Within the framework of this project the HiWatch Compact System will be utilized for this purpose.