1. Cold spray and thermal spraying

1.1 Principle

Thermal spraying conceals in its very name the two essential characteristics of the processes that make it up: on the one hand, the speed of the gas that sprays the powder that is to form the deposit and, on the other, the temperature of the particles (making up the powder) to which they are carried by this same gas. Depending on the values of these two parameters, the various processes in the thermal spraying family can be easily classified (figure 1 ). Apart from the spraying process, the other essential parameter is the powder, on which the choice of process depends. For this reason, a special section of this article is devoted to powder...