Abstract: During the coating of a component including cooling-air holes, it is necessary, when remachining the coated cooling-air holes, to determine the correct alignment of the cooling-air row. A process is provided in that at least two cooling-air holes are kept clear by a masking material during the coating and the alignment of the cooling-air row is effected on the basis of these two unclosed cooling-air hole.

Abstract: A process for coating an edge within a hole in a coated component is provided. The hole is a cooling-air hole operable conduct a coolant therethrough. According to the processes, an outer coating is provided on the outer surface of the component. An inner coating is provided on an inner surface within the hole, wherein the inner coating within the hole takes place using a coating nozzle at a different angle to the coating of the outer surface around the hole, if the spray angles for the outer coating and inner coating relate to the outer surface.

Abstract: A test component coated with a coating system is provided. In at least one defined region of the test component, there is a delamination having defined properties deliberately introduced into the coating system. The test component may be employed in a method for testing a thermography apparatus that is designed for carrying out a thermography method, for its correct operation with a view to the detection of delaminations. In order to test the thermography apparatus, the at least one defined delamination of the coating system is detected on the test component by using the thermography method employed in the thermography apparatus.

Abstract: A plasma spray nozzle is provided. Owing to their high degree of wear, previous plasma spray nozzles were not suitable for the coating of components for which long coating times were necessary. The coating times may be reduced considerably by the triple injection of powder into the inner channel through the plasma spray nozzle.

Abstract: A process of laser machining a layer system is provided. The layer system has at least one metallic substrate and an outer ceramic layer. After laser machining the layer system, a layer thickness of the outer ceramic layer is reduced by a laser process and/or a smoothing process. The laser machining includes creating a plurality of passage holes using a diffuser.

Abstract: A metallic solder rod is provided. The solder rod includes a stop-off at the end so that the solder cannot drip from an opening. The solder rod includes an inner region and an outer region which at least partially surrounds the inner region wherein the inner region includes a different alloy than the outer region. A process for applying solder to a hole in a substrate is also provided.

Abstract: A process for coating an edge within a hole in a coated component is provided. The hole is a cooling-air hole operable conduct a coolant therethrough. According to the processes, an outer coating is provided on the outer surface of the component. An inner coating is provided on an inner surface within the hole, wherein the inner coating within the hole takes place using a coating nozzle at a different angle to the coating of the outer surface around the hole, if the spray angles for the outer coating and inner coating relate to the outer surface.

Abstract: Conventional welding methods have the disadvantage of producing worse welded joints at the beginning of the process than in the later course of the method. The method in question uses an initializing plate on which the welding process is begun and then once a consistent quality can be achieved for the welded joint continues onto the points for repair.

Abstract: During the complete masking of film cooling holes when coating a component with film cooling holes, problems frequently arise when the cooling gas exits from the film cooling hole. The method is provided which proposes that the masking is only carried out sectionally such that part of the coating is present in the film cooling hole. Thus the flow may still form like a film on the component.

Abstract: A test component coated with a coating system is provided. In at least one defined region of the test component, there is a delamination having defined properties deliberately introduced into the coating system. The test component may be employed in a method for testing a thermography apparatus that is designed for carrying out a thermography method, for its correct operation with a view to the detection of delaminations. In order to test the thermography apparatus, the at least one defined delamination of the coating system is detected on the test component by using the thermography method employed in the thermography apparatus.

Abstract: A method for optimizing the coating of a component using a coupon by introducing the coupon into a depression of the component, in which the geometry of the component is not altered as compared to a component without a coupon, is provided. A component having a depression into which a coupon is fastened is also provided.

Abstract: A method for coating a substrate of a component is provided. Using the previous coating method, localized coating that can occur unexpectedly at one spot is often more difficult because the coating sequence must be reprogrammed here. This irregularity is resolved in a short period of time by a simple, manual coating.

Abstract: A shielding device for shielding a root of a blade or a vane for a spray coating process of the blade or the vane is provided. The shielding device includes a removable insert having a first member with one or more projections sized to sealingly fit into corresponding one or more grooves over an exposed part of the root of the blade or the vane, a second member with one or more projections sized to sealingly fit into corresponding one or more grooves over a remaining part of the root of the blade or the vane, wherein the first member and the second member are adapted to be coupled to sealingly fit on the blade or the vane.

Abstract: A two-layer system made of ceramic powder and metallic powder is provided. The ceramic powder may include zirconium oxide, aluminum oxide, titanium oxide, a perovskite, a spindle, a pyrochore and/or boron nitride and mixtures thereof. The metallic powder may include nickel, aluminum, cobalt and/or chromium, and mixtures or alloys thereof. A masking layer and a process for masking a substrate are also provided.

Abstract: A filler made of glass beads is provided. The glass improves the absorption and the distribution of the energy of the beam such that an internal wall of the hollow component is not damaged. A process for producing a through-hole in a hollow component is provided. Also, an apparatus for laser drilling is provided.

Abstract: During the coating of a component including cooling-air holes, it is necessary, when remachining the coated cooling-air holes, to determine the correct alignment of the cooling-air row. A process is provided in that at least two cooling-air holes are kept clear by a masking material during the coating and the alignment of the cooling-air row is effected on the basis of these two unclosed cooling-air hole.

Abstract: A plasma spray nozzle is provided. Owing to their high degree of wear, previous plasma spray nozzles were not suitable for the coating of components for which long coating times were necessary. The coating times may be reduced considerably by the triple injection of powder into the inner channel through the plasma spray nozzle.

Abstract: Process for preparing turbine blades or vanes for a subsequent treatment, for example the application of a coating and/or a material-removing operation, wherein the turbine blade or vane has an airfoil, which is delimited at at least one end by an endplate with peripheral surfaces, wherein at least one of the peripheral surfaces is at least partially covered prior to the treatment of the turbine blade or vane. In the process a covering strip is fitted onto at least one peripheral surface to form a plug connection.

Abstract: A method for preparing a blade of a turbomachine for a spray coating process is provided. The method includes providing a sheet of flexible material which is shaped such that, when the sheet is bent circumferentially around a blade root of the blade along a longitudinal axis of the blade, the sheet forms a circumferential cover on the surface of the blade root, and bending the sheet around the blade root to form the cover. The sheet is positioned on the blade root up to a platform between an airfoil and the blade root. The sheet is placed on the blade root such that the sheet forms a circumferentially closed structure around the blade root. Further, an arrangement for a spray coating process is provided.

Abstract: A process for applying a bonding primer layer for a protective ceramic layer on a component surface by high-velocity flame spraying is proposed. A coating material in the foam of at least one metal alloy powder is at least partially melted and is applied as particle stream with high velocity to the component surface. The coating material has two powder fractions that have a fine particle size and a coarse particle size. The coating material comprises an agglomerated and sintered powder.