Composite ceramic comprising a corrosion protection layer and production method
The present invention relates to a component of a turbomachine made of a composite material comprising a ceramic matrix and a corrosion protection layer arranged on the composite material. The corrosion protection layer comprises: 50-80 wt % silicon, 12-30 wt % nitrogen, 2-8 wt % oxygen, 2-8 wt % aluminum, and 0-3 wt % of at least one alkaline earth metal. The invention furthermore relates to a method for producing a corresponding component of a turbomachine.
1. A component of a composite material, wherein the component of the composite material comprises a ceramic matrix and a corrosion protection layer arranged thereon, the corrosion protection layer comprising:
from 50 to 80 wt % silicon,
from 12 to 30 wt % nitrogen,
from 2 to 8 wt % oxygen,
from 2 to 8 wt % aluminum, and
from 0 to 3 wt % of at least one alkaline earth metal.
2. The component of claim 1 , wherein the corrosion protection layer comprises:
from 60 to 70 wt % silicon,
from 15 to 25 wt % nitrogen,
from 3 to 7 wt % oxygen,
from 3 to 7 wt % aluminum, and
from 0.1 to 2.5 wt % of at least one alkaline earth metal.
3. The component of claim 1 , wherein the corrosion protection layer comprises:
from 64 to 66 wt % silicon,
from 18 to 22 wt % nitrogen,
from 4 to 6 wt % oxygen,
from 4 to 6 wt % aluminum, and
from 1 to 2 wt % of at least one alkaline earth metal.
4. The component of claim 1 , wherein the ceramic matrix is formed from at least one material selected from carbon, silicon carbide, aluminum oxide, and mullite.
5. The component of claim 1 , wherein the composite material comprising a ceramic matrix is a fiber composite material comprising ceramic fibers incorporated in the matrix.
6. The component of claim 5 , wherein the ceramic matrix is formed from at least one material selected from carbon, silicon carbide, aluminum oxide, and mullite.
7. The component of claim 5 , wherein the ceramic fibers are formed from at least one material selected from carbon, silicon carbide, aluminum oxide, and mullite.
8. The component of claim 6 , wherein the ceramic fibers are formed from at least one material selected from carbon, silicon carbide, aluminum oxide, and mullite.
9. The component of claim 1 , wherein at least one adhesion promoter layer is arranged between the composite material and the corrosion protection layer.
10. The component of claim 9 , wherein the at least one adhesion promoter layer is formed from a material selected from mullite, silicon, and a mixture of the material of the corrosion protection layer and mullite.
11. The component of claim 5 , wherein at least one adhesion promoter layer is arranged between the composite material and the corrosion protection layer.
12. The component of claim 11 , wherein the at least one adhesion promoter layer is formed from a material selected from mullite, silicon, and a mixture of the material of the corrosion protection layer and mullite.
13. The component of claim 3 , wherein the composite material comprising a ceramic matrix is a fiber composite material comprising ceramic fibers incorporated in the matrix.
14. The component of claim 13 , wherein the ceramic matrix is formed from at least one material selected from carbon, silicon carbide, aluminum oxide, and mullite.
15. The component of claim 13 , wherein the ceramic fibers are formed from at least one material selected from carbon, silicon carbide, aluminum oxide, and mullite.
16. The component of claim 14 , wherein the ceramic fibers are formed from at least one material selected from carbon, silicon carbide, aluminum oxide, and mullite.
17. The component of claim 3 , wherein at least one adhesion promoter layer is arranged between the composite material and the corrosion protection layer.
18. The component of claim 17 , wherein the at least one adhesion promoter layer is formed from a material selected from mullite, silicon, and a mixture of the material of the corrosion protection layer and mullite.
19. A method for producing a component of a turbomachine, wherein the method comprises depositing a corrosion protection layer on a semifinished product of a composite material comprising a ceramic matrix, the corrosion protection layer comprising
from 50 to 80 wt % silicon,
from 12 to 30 wt % nitrogen,
from 2 to 8 wt % oxygen,
from 2 to 8 wt % aluminum, and
from 0 to 3 wt % of at least one alkaline earth metal.
20. The method of claim 19 , wherein the corrosion protection layer is applied by at least one process selected from plasma spraying, suspension plasma spraying, low-pressure plasma spraying, physical vapor deposition, chemical vapor deposition, melting, hot-melt coating, brushing, rolling, spraying, and sintering.