Study of the particle behavior in a pulsed arc

• A new process method from concept to design and test equipment
• Overcome some of the problems in the experimental apparatus
• Powder particles are accelerated and melted in this process.
• With such a device, we obtain the coatings of the refractory powders.

This paper details a spray technique, named as “sparkjet”, which generates high-speed particles and a high temperature gas jet. It aims to demonstrate the feasibility of the process and the physical mechanisms, the influence of the process parameters on the characteristics of the flyer particles, and the quality of interfaces and coating structures. The coupling efficiency between the powder injector and the arc generator and the measurements of the process parameters were successively estimated. Tests proved the feasibility of this new process as well as its automated energy efficiency, which can offer a real potential application for developing metallic and ceramic coatings.