Abstract: This technology relates to a method and an apparatus for producing a material application 10 on a substrate surface 20 by means of cold spraying. Feedstock particles 14 and peening particles 16 are introduced into a process gas flow 20 in order to accelerate them. The accelerated particles 14 and peening particles 16 are directed in the process gas flow 20 onto the substrate surface. The feedstock particles 14 have a velocity to adhere to the substrate surface 30, thus forming the material application 10, and the peening particles 16 have a velocity that is too low for the peening particles 16 to adhere to the substrate surface 30. The feedstock particles 14 and the peening particles 16 comprise the same material or the same group of materials.

Abstract: In a method for producing a brake disc, a friction surface layer is sprayed onto the base body or onto an intermediate layer applied on the base body by cold gas spraying a particle mixture which consists 25 to 75% by weight of a metal matrix material and 75 to 25% by weight of a carbide material. The metal matrix material consists of an iron-based alloy, nickel-based alloy, titanium or titanium alloy. The carbide material consists of tungsten carbide, titanium carbide, iron carbide, silicon carbide, chromium carbide or niobium carbide.