Method and apparatus for producing a cold-sprayed material application

Method, in particular a cold-spraying method, for producing a material application on a substrate surface, wherein the material application is formed by feedstock particles of a feedstock material, and wherein the method comprises the following:

• directing a process gas flow through a convergent-divergent nozzle;
• introducing feedstock particles and peening particles into the process gas flow;
• accelerating the feedstock particles and the peening particles by means of a process gas flow directed through the nozzle arrangement;
• directing the accelerated feedstock particles and peening particles in the process gas flow onto a substrate surface, wherein the feedstock particles have a velocity to adhere to the substrate surface, thus forming the material application, and wherein the peening particles have a velocity that is too low for the peening particles to adhere to the substrate surface, wherein
• the peening particles have a median particle size that is larger than the median particle size of the feedstock particles, and wherein
• the feedstock particles and the peening particles comprise the same material or are made of the same group of materials.