Abstract:
A mixed powder thermal spraying method in which: a plasma jet is bent to carry out thermal spraying; in forming a mixed thermal spraying film comprising two kinds of materials having different melting points by bore thermal spraying, powder-feeding ports are provided for each material; and each powder-feeding port is controlled respectively to externally feed each material.
Abstract:
The invention discloses a material and an efficient method for the formation of a thermal-spray coating layer of a rare earth fluoride by a process of thermal-spray coating by using a unique thermal spray powder consisting of granules of the rare earth fluoride having a specified average particle diameter. The thermal-spray granules are prepared by granulating primary particles of the rare earth fluoride having a specified average particle diameter from an aqueous slurry containing a binder resin and subjecting the granules to a calcination treatment at a temperature not higher than 600null C.
Abstract:
The invention provides a method and an apparatus for thermally coating the cylinder barrels of a cylinder block of a combustion engine. During the coating operation, air flows through the cylinder bore whose barrel is to be coated with a flow velocity of between 7 m/s and 12 m/s. This air flow is generated by means of extraction, whereby the air is extracted from the bottom of the cylinder bore through the crank case of the cylinder block. For extracting the air, a plurality of extraction collars are provided that are connected to an extraction fan and are moved from the bottom through the crankcase to the lower end of the cylinder bores. During the coating operation, the pressure of the air flowing through extraction conduits to the extraction fan is measured and the value of the velocity of the air flow through the cylinder bore is calculated. An adjustment mechanism controls air chokes in the air conduits in response to the calculated flow velocity present in the cylinder bores.
Abstract:
The invention discloses a process for coating a base material (1) which is subject to friction with a protective layer (2) comprising MCrAlY by means of a thermal spraying process. The MCrAlY is fed to an injection nozzle in powder form and is applied to the base material (1). At the same time as the MCrAlY powder, a ceramic material in powder form, such as for example Al2O3, Si3N4, SiC, AlN, Cr3C2, MoSi2 or an equivalent material, is applied to the base material (1), a diffusion heat treatment is carried out and those locations of the applied coating (3) which are subject to friction are cut into a toothed or pointed shape.
Abstract translation:本发明公开了一种通过热喷涂方法涂覆与包含MCrAlY的保护层(2)摩擦的基材(1)的方法。 将MCrAlY以粉末形式供给到喷嘴,并施加到基材(1)上。 与MCrAlY粉末同时,将粉末形式的陶瓷材料(例如Al 2 O 3,Si 3 N 4,SiC,AlN,Cr 3 C 2,MoSi 2或等效材料)施加到基材(1)上,扩散热处理 并且经受摩擦的涂覆涂层(3)的那些位置被切成齿形或尖形。
Abstract:
The invention relates to a method for plasma coating a turbine blade (11), wherein at least three plasma torches (19, 21, 23) are used simultaneously with the aim of achieving a particularly high-quality coating (81), especially of McrAlX on a base body (30) made of a nickel or cobalt-based superalloy. The invention also relates to a coating device (1) to implement said method.
Abstract:
The invention describes a low temperature method for producing multi-layered or multi-phased coatings. With the technique according to the present invention, surface coatings with controlled variations in terms of chemical composition, phase composition, porosity, surface roughness, mechanical properties, biocompatibility, etc can be achieved. The method of coating a substrate surface comprises the steps of preparing several powder mixtures of different chemical composition containing at least a non-hydrated hydraulic ceramic powder binder phase, pre-treating a substrate surface, to increase the adhesion between the substrate and the ceramic coating, applying said non-hydrated powder mixtures of different chemical composition on the substrate as layers on top of each other, and finally, hydrating the powder layers in a curing agent.
Abstract:
The invention discloses a method of producing a light-scattering layer on a transparent body, in particular consisting of glass or a glass ceramic. The light-scattering layer is produced by thermal spraying a material such as aluminum oxide, titanium oxide etc. onto a surface of the preheated body with a maximum layer thickness of 100 micrometers. The method is particularly suited for preparing light-scattering layers on glass ceramic cooktops.
Abstract:
A method for coating the inside surface (5) of a gun barrel (1), at least in a partial region (2), with a layer of a layer material (9) for avoiding erosion. For the simple application of layer materials that melt at high temperatures to the inside surface (5) of the gun barrel (1), with the internal-stress state of the barrel (1) only being influenced to a small extent by the heat input, the coating is applied to the inside surface of the respective barrel (1) through plasma spraying, and simultaneously directing a laser beam (7) toward the inside surface (5) of the barrel (1), to melt the near-surface gun-barrel region (10) that is already coated or is to be coated. This causes the formation of a molten bath (11) that contains the melted gun-barrel material and the layer material in the near-surface region (10) of the barrel, with the bath hardening as the laser beam (7) continues to move.
Abstract:
A process for depositing a ceramic coating system for Si-containing materials, particularly those for articles exposed to high temperatures. The process is particularly applicable to depositing a compositionally-graded coating system comprising multiple ceramic layers with differing compositions, including a dense, strain-tolerant, vertically-cracked YSZ-containing ceramic layer deposited on a ceramic layer having a composition that is a mixture of YSZ and either mullite or BSAS. The process entails depositing the YSZ-containing ceramic layer using a plasma spraying technique while maintaining the substrate at a temperature so as not to form horizontal cracks in the coating system, but still maintain the dense vertically-cracked structure of the YSZ-containing ceramic layer for strain tolerance.
Abstract:
An apparatus is proposed for the thermal coating of a surface of a workpiece (20) comprising a torch (2) for the production of a coating jet (P), wherein the torch (2) is arranged in a processing station (14) such that the coating jet (P) extends substantially perpendicular to the vertical direction, and comprising adjustment means (40; 45; 60; 70) which align the workpiece (20) such that the surface to be coated is perpendicular to the coating jet (P) during the coating process.