摘要:
A granular composition is applied to tips of rotor blades utilized in a gas turbine engine wherein the blade tips rub against an abradable ceramic layer. Individual grains each have a core of silicon carbide and a layer of aluminum nitride on the core. A layer of a cladding metal may be bonded to the aluminum nitride. The composition also may include particles of cubic boron nitride and/or particles of metal alloy blended with the grains of silicon carbide.
摘要:
A pre-alloyed stabilized zirconia powder suitable for use in thermal barrier applications is formed by alloying zirconia with a stabilizer, such as yttria, and processing the alloyed stabilized zirconia to form a very fine powder. The raw powder is then spray-dried to produce an agglomerated powder having an average particle size suitable for use in spray coating applications. The resulting powder can be used in a thermal-spray application to produce a porous thermal barrier coating having a substantially decreased thermal conductivity when compared to conventional TB coatings, such those produced using plasma-densified powders.
摘要:
A solder composition for forming a solder joint. The composition includes a powder material including a solid metal matrix material and a filler material. The solid metal matrix material includes one or more of tin-silver-copper (Sn—Ag—Cu), tin-copper (Sn—Cu), tin-copper-nickel (Sn—Cu—Ni), tin-silver (Sn—Ag), tin-silver-bismuth (Sn—Ag—Bi), tin-bismuth-indium (Sn—Bi—In), tin-gold (Au—Sn), tin-zinc (Sn—Zn), tin-zinc-bismuth (Sn—Zn—Bi), tin-bismuth-silver (Sn—Bi—Ag), tin (Sn), tin-indium (Sn—In), indium (In), indium-silver (In—Ag), and tin-lead (Sn—Pb). The filler material includes one or more of copper (Cu), gold (Au), nickel (Ni), nickel-gold (Ni—Au), carbon, silver (Ag), aluminum (Al), molybdenum (Mo), nickel (Ni) or nickel-gold (Ni—Au) coated carbon, the platinum group metals (PGM's), and their alloys.
摘要:
To manufacture a thermal barrier coating structure on a substrate surface, a working chamber having a plasma torch is provided, a plasma jet is generated in that a plasma gas is conducted through the plasma torch and is heated therein by means of electric gas discharge, electromagnetic induction or microwaves, and the plasma jet is directed to the surface of a substrate introduced into the working chamber. To manufacture the thermal barrier coating, a voltage is additionally applied between the plasma torch and the substrate to generate an arc between the plasma torch and the substrate and the substrate surface is cleaned by means of the light arc, wherein the substrate remains in the working chamber after the arc cleaning and an oxide layer is generated on the cleaned substrate surface and a thermal barrier coating is applied by means of a plasma spray process.
摘要:
In the presented method for the manufacture of a thermal barrier coating structure (2) on a substrate surface (3) a ceramic coating material is applied onto the substrate surface by means of plasma spraying, wherein the thermal barrier coating structure includes at least two differently produced thermal barrier coatings (2.1, 2.2). For the manufacture of the one thermal barrier coating (2.1), the coating material is sprayed onto the substrate surface in the form of a powder jet by plasma spraying at atmospheric pressure (atmospheric plasma spraying or in abbreviation APS), and for the manufacture of the other thermal barrier coating (2.2) the coating material is applied onto the substrate surface by means of plasma spraying-physical vapor deposition or in abbreviation PS-PVD, such that a layer having elongate corpuscles develops on the substrate surface, which corpuscles form an anisotropic microstructure and are aligned essentially perpendicular to the substrate surface.
摘要:
A solder composition for forming a solder joint. The composition includes a powder material including a solid metal matrix material and a filler material. The solid metal matrix material includes one or more of tin-silver-copper (Sn—Ag—Cu), tin-copper (Sn—Cu), tin-copper-nickel (Sn—Cu—Ni), tin-silver (Sn—Ag), tin-silver-bismuth (Sn—Ag—Bi), tin-bismuth-indium (Sn—Bi—In), tin-gold (Au—Sn), tin-zinc (Sn—Zn), tin-zinc-bismuth (Sn—Zn—Bi), tin-bismuth-silver (Sn—Bi—Ag), tin (Sn), tin-indium (Sn—In), indium (In), indium-silver (In—Ag), and tin-lead (Sn—Pb). The filler material includes one or more of copper (Cu), gold (Au), nickel (Ni), nickel-gold (Ni—Au), carbon, silver (Ag), aluminum (Al), molybdenum (Mo), nickel (Ni) or nickel-gold (Ni—Au) coated carbon, the platinum group metals (PGM's), and their alloys
摘要:
A method of coating a substrate by thermal application of the coating materials using a plasma jet is disclosed. The properties of the plasma jet are determined by controllable process parameters. The coating material and a process gas mixture are injected into the plasma jet where the coating material is partly or completely evaporated depending on the controllable parameters. The phases of the coating material present in vapor and, optionally, condensed form are at least partly deposited on the substrate. A diagnostic measuring method determines the relative proportion of vapor and/or condensed phase for the coating material transported in the plasma jet. The controllable process parameters are set with respect to desired values using such measured data. Regulation of direct manufacture of the coating, particularly a multi-layer coating system, is carried out with respect to these desired values, which correspond to a predetermined vapor or condensed phase proportion.
摘要:
A method is proposed of coating a surface of a body which has at least one throughgoing bore having an inlet and having an outlet, wherein the outlet is provided in the surface to be coated, in which method the coating takes place by means of thermal spraying, wherein, during the thermal spraying, the bore is flowed through by a fluid which flows out through the outlet of the bore and substantially prevents a constriction of the bore caused by the coating.
摘要:
The present invention provides a powder blend or composite powder that is fed into a kinetic spray device, accelerated towards a substrate or part in order to form a composite solder with thermal and electrical properties better than existing solder. The other advantages of building a solder layer in this manner include a low oxide content to improve subsequent solderability, excellent control of the deposition thickness, excellent control of the deposition chemistry and lastly, high speed of manufacture.
摘要:
The invention relates to a component and also an associated coating apparatus and method, including a base body (1), in particular a metallic base body, which includes at least one nickel and/or cobalt base alloy, and also a layer system arranged directly on the base body (1). The layer system includes a bond promoting layer (2) and also a thermally insulating layer arranged on the bond promoting layer, including a TGO layer (3), in particular a slow growing aluminium oxide layer (4) and/or chrome oxide layer as well as at least one oxide ceramic layer which is arranged directly on the TGO layer and a cover layer (5) of an A2E2O7 pyrochlorine arranged on the oxide ceramic layer (4). A preferably includes a lanthanide, in particular gadolinium and E preferably includes zirconium, and also in particular lanthanum zirconate, and/or a perovskite phase. The layer thicknesses of the oxide ceramic layer (4) and the cover layer (5) together amount to between 50 μm and 2 mm, in particular together amount to between 100 μm and 500 μm.
摘要翻译:本发明涉及一种组件以及相关的涂覆设备和方法,包括基体(1),特别是金属基体,其包括至少一种镍和/或钴基合金,以及直接布置的层系统 在基体(1)上。 层系统包括粘结促进层(2),以及布置在粘结促进层上的绝热层,包括TGO层(3),特别是缓慢生长的氧化铝层(4)和/或氧化铬层 以及直接布置在TGO层上的至少一个氧化物陶瓷层和A 2 O 2 O 2 O 7的覆盖层(5) 配置在氧化物陶瓷层(4)上的高氯氯化物。 A优选包括镧系元素,特别是钆,E优选包括锆,特别是锆酸镧和/或钙钛矿相。 氧化物陶瓷层(4)和覆盖层(5)的层厚度一起在50μm和2mm之间,特别是在100μm和500μm之间。