Component with a platinum-aluminum substrate area, platinum-aluminum coating and production method
AssigneeMTU Aero Engines AG
InventorsErnst Affeldt, Anja Kliewe, Lothar Peichl, Heinrich Walter
Life of this patent
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Abstract
A component having a platinum-aluminum substrate surface region which is formed in the area of the substrate surface of the component by diffusion of platinum and aluminum into the substrate surface and which contains platinum and aluminum as well as the constituents of the substrate composition. The integrated aluminum content and/or the integrated platinum content in the substrate area is less than 18 wt %.
Claims57
A component with a platinum-aluminum substrate surface region comprising:
- a component substrate, having a composition based on a nickel alloy or a titanium alloy and composed of one or more constituents, and having a substrate surface;
- and
- a substrate surface region at the component surface formed by diffusion of platinum and aluminum into the substrate surface, the substrate surface region comprising platinum, aluminum, and at least one constituent of the substrate composition,
- wherein at least one of the platinum content and the aluminum content is essentially constant in a zone of the substrate surface region, and said zone comprises at least 20% of a region bounded on one side by the substrate surface or a point directly beneath the substrate surface, and bounded on the other side by a region depth at which the platinum content is 5 wt % or less, the aluminum content is 8 wt % or less, and the platinum content and the aluminum content remain below 5 wt % and 8 wt %, respectively, beyond the region depth,
- wherein the integrated aluminum content in the substrate surface region is less than 18 wt %.
A component with a platinum-aluminum substrate surface region comprising:
- a component substrate, composed of one or more constituents, having a substrate surface;
- and
- a substrate surface region at the component surface, the substrate surface region comprising platinum, aluminum, and at least one constituent of the substrate composition,
- wherein at least one of the platinum content and the aluminum content is essentially constant in a zone of the substrate surface region, and said zone comprises at least 20% of a region bounded on one side by the substrate surface or a point directly beneath the substrate surface, and bounded on the other side by a region depth at which the platinum content is 5 wt % or less, the aluminum content is 8 wt % or less, and the platinum content and the aluminum content remain below 5 wt % and 8 wt %, respectively, beyond the region depth,
- wherein the integrated aluminum content in the substrate surface region is less than 18 wt %.
A platinum aluminum coating for a component having a substrate composed of one or more constituents, the coating comprising a substrate surface region composed of platinum, aluminum, and at least one constituent of the substrate composition, wherein the integrated aluminum content in a surface layer is less than 18 wt % and
- wherein at least one of the platinum content and the aluminum content is essentially constant in a zone of the substrate surface region and said zone comprises at least 20% of a region bounded on one side by the substrate surface or a point directly beneath the substrate surface, and bounded on the other side by a region depth at which the platinum content is 5 wt % or less, the aluminum content is 8 wt % or less, and the platinum content and the aluminum content remain below 5 wt % and 8 wt %, respectively, beyond the region depth.
A method of producing a component having a platinum-aluminum substrate surface region, comprising:
- a) providing a component having a substrate with a substrate surface and a substrate composition composed of one or more constituents;
- b) diffusing platinum into the substrate surface of the component;
- and
- c) diffusing aluminum into the substrate surface of the component subsequent to said diffusion of platinum to form a component with a platinum-aluminum substrate surface region, wherein the integrated aluminum content in the platinum-aluminum substrate surface region is less than 18 wt %
- wherein said steps of diffusing are performed so that at least one of the aluminum content and the platinum content is essentially constant in a zone of the substrate surface region and said zone comprises at least 20% of a region bounded on one side by the substrate surface or a point directly beneath the substrate surface, and bounded on the other side by a region depth at which the platinum content is 5 wt % or less, the aluminum content is 8 wt % or less, and the platinum content and the aluminum content remain below 5 wt % and 8 wt %, respectively, beyond the region depth.
A component having a platinum-aluminum substrate surface region, comprising:
- a component substrate having a substrate composition composed of one or more constituents;
- and
- a substrate surface region formed at a surface of the component substrate by diffusion of platinum and aluminum into the substrate surface, the substrate surface region comprising platinum, aluminum, and one or more constituents of the substrate composition,
- wherein at least one of the platinum content and the aluminum content is essentially constant in a zone of the substrate surface region and said zone comprises at least 20% of a region bounded on one side by the substrate surface or a point directly beneath the substrate surface, and bounded on the other side by a region depth at which the platinum content is 5 wt % or less, the aluminum content is 8 wt % or less, and the platinum content and the aluminum content remain below 5 wt % and 8 wt %, respectively, beyond the region depth.
A platinum-aluminum coating for a component having a substrate, wherein the substrate is composed of one or more constituents and the coating is formed by diffusing platinum and aluminum into a surface of the substrate to form a substrate surface region containing platinum, aluminum, and at least one constituent of the substrate composition, and wherein at least one of the aluminum content and the platinum content remain essentially constant in a zone of the substrate surface region and said zone comprises at least 20% of a region bounded on one side by the substrate surface or a point directly beneath the substrate surface, and bounded on the other side by a region depth at which the platinum content is 5 wt % or less, the aluminum content is 8 wt % or less, and the platinum content and the aluminum content remain below 5 wt % and 8 wt %, respectively, beyond the region depth.
A method of producing a component having a platinum-aluminum substrate surface region, comprising:
- a) providing a component having a substrate with a substrate surface and a substrate composition composed of one or more constituents,
- b) diffusing platinum into the substrate surface,
- c) diffusing aluminum into the substrate surface subsequent to said diffusion of platinum so that at least one of the aluminum content and the platinum content is essentially constant in a zone of the substrate surface region and said zone comprises at least 20% of a region bounded on one side by the substrate surface or a point directly beneath the substrate surface, and bounded on the other side by a region depth at which the platinum content is 5 wt % or less, the aluminum content is 8 wt % or less, and the platinum content and the aluminum content remain below 5 wt % and 8 wt %, respectively, beyond the region depth.
Dependencies are inferred from the claim text.