Patent ID: 8197895
Filing Date: 2012-06-12
Classification: B05B,C23C

Abstract:
1. A cold gas spraying process, comprising the steps of: feeding particles of a first type together with particles of a second type into a stagnation chamber and accelerating the particles, together with a heated carrier gas, through a nozzle connected downstream of the stagnation chamber onto a substrate to be coated, wherein the particles of the first type deform and remain adhering to the substrate to form a layer, and wherein the particles of the second type, which have at least one of a higher hardness and a lower ductility than the particles of the first type, are incorporated into the layer, wherein the particles of the first type are fed into a first area of the stagnation chamber, which is closer to the nozzle than a second area, into which the particles of the second type are fed, wherein due to the first area of the stagnation chamber into which the particles of first type are fed being located closer to the nozzle than the second area of the stagnation chamber into which the particles of second type are fed, the particles of the second type are mixed with the heated carrier gas for longer than the particles of the first type are mixed with the heated carrier gas, such that an introduction of enemy into the particles of the second type from the heated carrier gas is greater than an introduction of energy into the particles of the first type from the heated carrier gas, and wherein the introduction of energy into the particles of the second type from the heated carrier gas increases the incorporation rate of the particles in the layer formed on the substrate.