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US 2020/0095669 A1Published application
High-temperature component and method for producing a high-temperature component
AssigneePlansee SE
InventorsBernhard Mayr-Schmoelzer, Ingmar Wesemann
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Abstract
A high-temperature component of a refractory metal or a refractory metal alloy has an emissivity-increasing coating. The coating is formed of tantalum nitride and/or zirconium nitride; and tungsten with a tungsten content between 0 and 98 wt. %.
Claims15
A high-temperature component, comprising:
- a component body of refractory metal or a refractory metal alloy;
- an emissivity-increasing coating on said component body, said coating consisting essentially of:
- at least one nitride selected from the group consisting of tantalum nitride and zirconium nitride, and tungsten with a tungsten content between 0 and 98 wt. %.
A method for producing a high-temperature component with an emissivity-increasing coating, the method comprising:
- providing a main component body of the high-temperature component and carrying out one of the following method steps i), ii), or iii):
- i) increasing a surface area of the main body of the high-temperature component, and
- coating the main component body with ZrN and/or TaN and optionally tungsten by physical vapor deposition;
- or
- ii) coating the main component body with Zr-containing and/or Ta-containing powder, and optionally tungsten, by a powder-metallurgical method, and
- heat treating the coated main body in a nitrogen-containing atmosphere;
- or
- iii) coating the main component body with ZrN and/or TaN, and optionally tungsten, by a powder-metallurgical method, and
- heat treating the coated main body in a nitrogen-containing and/or argon-containing atmosphere.
6 more elements
Dependencies are inferred from the claim text.