Patent ID: 8986792
Filing Date: 2015-03-24
Classification: B01D,C23C,Y02T,Y10T

Abstract:
1. A method of applying a thermal barrier coating ( 10 ) to a substrate surface, wherein in the method a work chamber ( a plasma jet ( a ceramic coating material is applied to the substrate surface by means of plasma spray physical vapor deposition or PS-PVD in abbreviation, with the coating material being injected into the plasma jet as a powder and being partly or completely vaporized there, wherein on the application of the thermal barrier coating ( in a second workstep, the feed rate of the injected powder is increased by at least a factor of 3, compared to the feed rate of the injected powder in the first workstep, whereby the relative portion of the injected powder which vaporizes is reduced compared to the relative portion of the injected powder which vaporizes in the first workstep, in the second workstep, the coating material is deposited in the form of elongate columns which form an anisotropic microstructure and which are aligned substantially perpendicular to the substrate surface, and the ceramic coating material deposited in the first and second workstep forms the thermal barrier coating.