Method for applying a coating to a surface of a mullite material, mullite material having a coating, and gas turbine component
AssigneeOerlikon Surface Solutions AG, PfäFfikon
InventorsWerner Stamm, Simone Friedle, Juergen Ramm
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Abstract
A method for applying a coating 1 to a surface 2 of a mullite material 3 is specified, which comprises pretreating the surface 2 of the mullite material 3 by means of a plasma-chemical process in which molecular hydrogen is excited in such a way that plasma-activated hydrogen is produced S1, and applying an aluminum oxide-containing layer 4 by means of a PVD process to the pretreated surface 2 of the mullite material 3 S2. Furthermore, a mullite material 3 with a coating and a gas turbine component with such a mullite material 3 are specified.
Claims18
A method for applying a coating to a surface of a mullite material comprising:
- pre-treating the surface of the mullite material using a plasma-chemical process in which molecular hydrogen is excited in such a way that plasma-activated hydrogen is produced, and
- applying an aluminum oxide-containing layer on the pretreated surface of the mullite material using a PVD process.
A mullite material comprising an aluminum oxide-containing layer arranged on a surface of the mullite material, wherein spike-like structures with tips directed into the aluminum oxide-containing layer are formed in a boundary area between the mullite material and the aluminum oxide-containing layer wherein the spike-like structures have a width b between 50 nm and 200 nm and a height h of between 100 nm and 500 nm.
Dependencies are inferred from the claim text.