Abstract: The object of the present invention is to produce a metal part equipped with a protection system, particularly for turbine blades for aircraft engines, having a thermal barrier that is improved in terms of thermal properties, adhesion to the part and resistance to oxidation/corrosion. In order to achieve this, the method according to the invention produces in a single step, from specific ceramics, coating layers using SPS technology. According to one embodiment, a metal part is produced according to an SPS flash sintering method and comprises a superalloy substrate (22), a metal sub-layer (21), a TGO oxide layer (25) and the thermal barrier (23) formed by said method from at least two chemically and thermally compatible ceramic layers (2a, 2b). A first ceramic (2a), referred to as the inner ceramic, is designed to have a substantially higher expansion coefficient.

Abstract: The object of the present invention is to produce a metal part equipped with a protection system, particularly for turbine blades for aircraft engines, having a thermal barrier that is improved in terms of thermal properties, adhesion to the part and resistance to oxidation/corrosion. In order to achieve this, the method according to the invention produces in a single step, from specific ceramics, coating layers using SPS technology. According to one embodiment, a metal part is produced according to an SPS flash sintering method and comprises a superalloy substrate (22), a metal sub-layer (21), a TGO oxide layer (25) and the thermal barrier (23) formed by said method from at least two chemically and thermally compatible ceramic layers (2a, 2b). A first ceramic (2a), referred to as the inner ceramic, is designed to have a substantially higher expansion coefficient.

Abstract: A method for producing a thermal barrier in a multilayered system for protecting a metal part made of superalloy, by producing a thermal treatment by flash sintering protection materials in layers superposed on the metal part in an SPS machine enclosure. The layers contain, on a superalloy substrate, at least two layers of zirconium-based refractory ceramics. A metal part is produced according to a SPS flash sintering method and contains a superalloy substrate, a metal sub-layer, a TGO oxide layer and the thermal barrier formed by the method. A first ceramic is an inner ceramic designed to have a substantially higher expansion coefficient. An outer ceramic is designed to have at least lower thermal conductivity, and at least one of a sintering temperature or maximum operating temperature that is substantially higher. The thermal barrier has a composition and porosity gradient from the metal sub-layer to the outer ceramic.

Abstract: The invention relates to a method of fabricating a bath of electrolyte for plating a platinum-based metal underlayer on a metallic substrate, comprising: a) providing a first system having ligands and amine functional groups, the first system being constituted by an aqueous solution of an amino ligand comprising at least one compound X—(NH2)n, where X belongs to the group constituted by (CH3, CH3—CH2, CH3—(CH2)m), or NH3 or an xP?(NH4)+p salt where x is an acid radical belonging to the group constituted by (PO43?, HPO42?, H2PO4?, HPO42?and H2PO4?, SO42?, HSO4?, H2SO4, HSO4?, and H2SO4, CH3COO?, CH3COOH, and CH3COO?), or H2SO4, or CH3COOH, and where n, m, and p are non-zero integers; b) providing a second system forming a buffer system; c) providing a third system providing a metallic salt, and constituted by an aqueous solution of platinum; d) providing a fourth system suitable for imparting the conduction property to the medium; and e) mixing together the four systems so as to obtain the electrolyte bath.

Abstract: A method for cleaning a turboshaft engine blade comprising a superalloy body covered with a coating, in which the coating of the blade is at least partially machined using a pulsed laser. At least the feed rate of the pulsed laser and the pulse frequency of the pulsed laser are parameterized such that the machined surface of the blade has a roughness of 4 ?m to 10 ?m.

Abstract: A method is for producing a metal undercoat made from platinum on a metallic substrate. The method includes providing a metallic part forming a substrate, providing an electrolyte bath formed from an ionic liquid medium with one or more aluminium salts, depositing a first layer of a first metal on the substrate so as to obtain a substrate coated with the first metallic layer, depositing a second layer of a second metal on the first layer so as to obtain a substrate coated with the first metallic layer and the second metallic layer. One of the first metal and the second metal is a metal of the platinum group (platinoid) and the other from the first metal and the second metal is aluminium deposited by electroplating with the electrolyte bath formed from an ionic liquid medium.

Abstract: A process and device in production of precise three-dimensional sinters of a shape substantially close to that of an original part, using flash sintering produced by spark plasma sintering (SPS) technology. A mold is produced in a die of an enclosure for SPS flash sintering, the mold being shaped as an impression of the original part. The following are deposited in successive layers in the mold: a layer based on a superalloy powder, a metallic protection layer, and a thermal barrier layer. In a sintering, pressurization is initiated and a pulsed current passes through, producing a rapid rise in temperature in accordance with a flash sintering cycle whose temperature, pressure, and duration are regulated, with at least one temperature plateau and one pressure plateau. The layer of superalloy forms, by diffusion, during the sintering, a bonding continuum of material with the part to be repaired.

Abstract: The invention relates to a method of fabricating a bath of electrolyte for plating a platinum-based metal underlayer on a metallic substrate, the method comprising the following steps: a) providing a first system having ligands and amine functional groups, said first system being constituted by an aqueous solution of an amino ligand comprising at least one compound X—(NH2)n, where X belongs to the group constituted by (CH3, CH3—CH2, CH3—(CH2)m), or NH3 or an xp?(NH4)+p salt where x is an acid radical belonging to the group constituted by (PO43?, HPO42?, H2PO4?, HPO42?and H2PO4?, SO42?, HSO4?, H2SO4, HSO4?, and H2SO4, CH3COO?, CH3COOH, and CH3COO?), or H2SO4, or CH3COOH, and where n, m, and p are non-zero integers; b) providing a second system forming a buffer system; c) providing a third system providing a metallic salt, and constituted by an aqueous solution of platinum; d) providing a fourth system suitable for imparting the conduction property to the medium; and e) mixing together the four systems so as

Abstract: A method for cleaning a turboshaft engine blade comprising a superalloy body covered with a coating, in which the coating of the blade is at least partially machined using a pulsed laser. At least the feed rate of the pulsed laser and the pulse frequency of the pulsed laser are parameterised such that the machined surface of the blade has a roughness of 4 ?m to 10 ?m.

Abstract: A process and device in production of precise three-dimensional sinters of a shape substantially close to that of an original part, using flash sintering produced by spark plasma sintering (SPS) technology. A mold is produced in a die of an enclosure for SPS flash sintering, the mold being shaped as an impression of the original part. The following are deposited in successive layers in the mold: a layer based on a superalloy powder, a metallic protection layer, and a thermal barrier layer. In a sintering, pressurization is initiated and a pulsed current passes through, producing a rapid rise in temperature in accordance with a flash sintering cycle whose temperature, pressure, and duration are regulated, with at least one temperature plateau and one pressure plateau. The layer of superalloy forms, by diffusion, during the sintering, a bonding continuum of material with the part to be repaired.

Abstract: A method for producing a thermal barrier in a multilayered system for protecting a metal part made of superalloy, by producing a thermal treatment by flash sintering protection materials in layers superposed on the metal part in an SPS machine enclosure. The layers contain, on a superalloy substrate, at least two layers of zirconium-based refractory ceramics. A metal part is produced according to a SPS flash sintering method and contains a superalloy substrate, a metal sub-layer, a TGO oxide layer and the thermal barrier formed by the method. A first ceramic is an inner ceramic designed to have a substantially higher expansion coefficient. An outer ceramic is designed to have at least lower thermal conductivity, and at least one of a sintering temperature or maximum operating temperature that is substantially higher. The thermal barrier has a composition and porosity gradient from the metal sub-layer to the outer ceramic.

Abstract: A process for depositing a ceramic layer on a metal substrate for producing a thermal barrier, the process including depositing the ceramic in a columnar structure. The deposition is carried out through a grid pierced with holes, which is positioned parallel to a surface of the substrate so as to produce ceramic columns separated from one another by a space. The process can further include a subsequent depositing of an isotropic ceramic layer in the spaces.