A coating system includes a diffusion coating on a refractory metal or refractory metal alloy. The coating can be applied to a component such as a rocket engine component that includes a substrate including the refractory metal and is useful to protect the substrate from high temperature oxidation. The diffusion coating process employs an activator that includes a compound of the metal to be diffused into the surface of the substrate and is a vapor phase process in which the vapor includes metal from the activator and additional from the metal source being activated. Aluminum trifluoride can be used to activate an aluminum metal source to form an aluminide coating on a refractory metal-based alloy, such as a niobium alloy.
A coated component for use in a fluid energy device includes a coating system with multiple layers of coating material, including a soft material such as a polymer coated over a hard material such as a metal. The fluid energy device can be a fluid motor or fluid pump, and the coated component can be a rotor or a stator. The hard and soft materials may be interlocked with each other and/or with an interposed porous layer. The presence of the soft material can reduce or eliminate the need for meticulous polishing operations typically required with as-applied hard materials while improving the longevity of mating fluid energy device components. The mating components are exposed only to the soft material in the initial stages of operation, after which the soft material wears away to gradually expose the mating components to the hard material in a less abrasive manner.
F04C 2/107 - Machines ou pompes à piston rotatif du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés du type à axe interne, l'organe externe ayant plus de dents ou de parties équivalentes de prise, p. ex. de rouleaux, que l'organe interne avec des dents hélicoïdales
F04C 13/00 - Adaptations des "machines" ou pompes pour utilisation particulière, p. ex. pour très hautes compressions
A coated component for use in a fluid energy device includes a coating system with multiple layers of coating material, including a soft material such as a polymer coated over a hard material such as a metal. The fluid energy device can be a fluid motor or fluid pump, and the coated component can be a rotor or a stator. The hard and soft materials may be interlocked with each other and/or with an interposed porous layer, The presence of the soft material can reduce or eliminate the need for meticulous polishing operations typically required with as-applied hard materials while improving the longevity of mating fluid energy device components. The mating components are exposed only to the soft material in the initial stages of operation, after which the soft material wears away to gradually expose the mating components to the hard material in a less abrasive manner.
A metal article such as a gas turbine component may include a super-diffusion coating with unusually high content of the desired constituent. The coating may be provided by combining two or more diffusion coating processes, each process interdiffusing the desired constituent with the metal article from a different metal source. The metal article can be placed in physical contact with a metal source in powder form as a first source, and the article can also be exposed an additional metal vapor source. Super-chromide coatings can be produced with alpha-chrome content in a manner that also provides the coating with sufficient ductility for long-term durability. For example, a shank portion of a gas turbine blade may be provided with a chromide coating with at least a portion of the coating having from 60-90% chromium content.
C23C 16/08 - Revêtement chimique par décomposition de composés gazeux, ne laissant pas de produits de réaction du matériau de la surface dans le revêtement, c.-à-d. procédés de dépôt chimique en phase vapeur [CVD] caractérisé par le dépôt d'un matériau métallique à partir d'halogénures métalliques
B32B 15/01 - Produits stratifiés composés essentiellement de métal toutes les couches étant composées exclusivement de métal
A gas turbine component for use in a gas turbine engine includes a substrate and a non-aluminide protective coating with a platinum-group metal. The platinum-group metal resides in a gamma-prime phase of the underlying material. The platinum-group metal can impart the protective coating with superior corrosion-resistance, while the absence of aluminide in the protective coating facilitates use of the protective coating at high-stress and/or high-fatigue portions of the component. The protective coating optionally includes chromide and can also be combined with aluminide at select portions of the component.
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
37 - Services de construction; extraction minière; installation et réparation
Produits et services
Coating and surface treatment services, namely, application of coatings and sealers to metal and non-metal surfaces for protection, oxidation and corrosion resistance, thermal and electrical insulation, electrical conductivity, wear resistance, lubrication, electrostatic discharge control, EMI/RFI shielding, and dimensional restoration; Surface treatment services, namely, grinding and polishing of metal and non-metal surfaces and anodizing of metal surfaces Coating and surface treatment services, namely, application of coatings and sealers
PROTECTIVE COATINGS FOR METAL COMPONENTS FOR INORGANIC COATINGS DIFFUSIBLE INTO METAL COMPONENTS TO PROTECT SUCH COMPONENTS FROM DELETERIOUS ENVIRONMENTS
