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US 2020/0165718 A1Published application
Pvd bond coat
AssigneeOerlikon Surface Solutions AG, PfäFfikon
InventorsJurgen Ramm, Beno Widrig, Peter Polcik, Malko Gindrat
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Abstract
Superalloy workpiece including a superalloy substrate and an interface layer (IF-1) of essentially the same superalloy composition directly on a surface of the superalloy substrate, followed by a transition layer (TL) of essentially the same superalloy and supperalloy oxides or a different metal composition and different metal oxides whereby oxygen content of the transition layer is increasing from IF-1 towards a barrier layer (IF-2) of super alloy oxides or of different metal oxides.
Claims27
Coating method comprising the following steps:
- providing a superalloy (SA) substrate in a PVD-coating unit;
- providing a superalloy target as a cathode of an arc source of the coating unit;
- providing a substrate bias to the substrate;
- depositing an interface layer (IF-1) of superalloy on a surface of the substrate by vacuum arc deposition from the superalloy target;
- providing a supply for reactive gas containing oxygen to the coating unit;
- depositing a transition layer (TL) of the same superalloy or a different metal composition by vacuum arc deposition whereby an oxygen content of the layer is varied from (IF-1) towards the surface by changing a partial pressure of the reactive gas in the process atmosphere;
- depositing a barrier layer (IF-2) comprising a higher amount of super alloy oxides or of a different metal oxides composition than within the transition layer subsequent to the transition layer by vacuum arc deposition in a process atmosphere containing reactive gas in a higher concentration as with the deposition of the transition layer (TL).
4 more elements
Superalloy workpiece comprising:
- a superalloy substrate
- an interface layer (IF-1) of essentially the same superalloy composition directly on a surface of the superalloy substrate, followed by
- a transition layer (TL) of essentially the same superalloy and supperalloy oxides or a different metal composition and different metal oxides whereby oxygen content of the transition layer is increasing from IF-1 towards
- a barrier layer (IF-2) of super alloy oxides or of different metal oxides.
1 more element
Dependencies are inferred from the claim text.