Hot gas component of a turbomachine including an embedded channel
First Claim
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1. A hot gas component of a turbomachine, the component comprising:
- a monocrystalline basic body including an outer wall;
a component outer surface;
at least one passage embedded in the outer wall and extending parallel to the component outer surface, which at least one passage is configured and arranged to conduct a cooling medium;
at least one coating on the outer wall of the basic body, the at least one passage formed by a cavity in the basic body closed off towards the outer surface by the at least one coating; and
wherein the at least one coating is formed of a material having a monocrystalline structure which is epitaxially connected to the monocrystalline basic body.
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Abstract
A component, especially a hot gas component of a turbomachine, has at least one passage (7, 7′), especially a cooling passage, which is embedded in an outer wall (5) of the component (1) of the turbomachine and basically extends parallel to the surface (6) of the component (1). The component (1) has a basic body (8) and at least one coating (9) which is applied to the basic body on the outside, and the passage (7, 7′) on one hand is formed by a cavity which is formed in the basic body (8), and on the other hand is closed off towards the surface (6) of the component (1) by the coating (9).
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Citations
28 Claims
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1. A hot gas component of a turbomachine, the component comprising:
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a monocrystalline basic body including an outer wall; a component outer surface; at least one passage embedded in the outer wall and extending parallel to the component outer surface, which at least one passage is configured and arranged to conduct a cooling medium; at least one coating on the outer wall of the basic body, the at least one passage formed by a cavity in the basic body closed off towards the outer surface by the at least one coating; and wherein the at least one coating is formed of a material having a monocrystalline structure which is epitaxially connected to the monocrystalline basic body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A hot gas component of a turbomachine formed by a method comprising:
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forming at least one passage-like cavity in a basic body of the component; covering the at least one passage-like cavity by applying a coating material to the basic body; locally surface melting the basic body at least on two sides of the cavity simultaneous with said applying and with melting the coating material at least in the region of the cavities, wherein the coating material, a process temperature, and the width of the cavity are matched to each other so that the molten coating material does not penetrate into the cavity on account of surface tension; and cooling and hardening the molten coating material so that the coating material is epitaxially built up on the basic body, achieving a metallurgical connection to the basic body on the two sides of the cavity. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification