Patent ID: 7998600
Filing Date: 2011-08-16
Classification: B22F,C22C,C23C,Y02T,Y10T

Abstract:
1. A layer system used to coat a substrate with a coating layer, comprising: a substrate comprised of a nickel-based alloy; and a protective mask layer on a surface of the substrate that is not to be coated with the coating layer, a coating layer formed on the surface of the substrate in areas not covered by the protective mask layer; wherein the protective mask layer has a non-sintered dry composition, wherein the dry composition consists essentially of carbon powder and a nickel powder, wherein the carbon powder may be at least partially in chemically bonded form, and, wherein the protective mask layer has a nickel concentration gradient with a higher nickel concentration at a surface of the substrate thereby preventing diffusion of nickel from the substrate into the protective mask layer, and the protective mask layer is removed after application of the coating layer.