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US 12,397,907 B2Granted
High temperature oxidation protection for composites
AssigneeGoodrich Corporation
InventorsSteven A. Poteet, Gavin Charles Richards, Zachary Cohen
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Abstract
An oxidation protection system disposed on a substrate is provided, which may comprise a boron layer comprising a boron compound disposed on the substrate; a silicon layer comprising a silicon compound disposed on the boron layer; and at least one sealing layer comprising monoaluminum phosphate and phosphoric acid disposed on the silicon layer.
Claims6
An aircraft brake disk, comprising:
- a carbon-carbon composite structure comprising a non-wear surface;
- and
- an oxidation protection system disposed on the non-wear surface, the oxidation protection system comprising:
- a boron layer comprising a boron compound disposed on the composite structure, wherein the boron compound comprises boron carbide;
- a silicon layer comprising a silicon compound disposed on the boron layer;
- a first sealing layer disposed on the silicon layer, wherein the first sealing layer comprises monoaluminum phosphate, phosphoric acid, and a surfactant;
- and
- a second sealing layer disposed on the first sealing layer, wherein the second sealing layer comprises monoaluminum phosphate and phosphoric acid,
- wherein the first sealing layer and the second sealing layer are substantially free of phosphate glass.
6 more elements
An oxidation protection system disposed on an outer surface of a substrate, comprising:
- a boron layer comprising a boron compound disposed on the composite structure, wherein the boron compound comprises boron carbide;
- a silicon layer comprising a silicon compound disposed on the boron layer;
- a first sealing layer disposed on the silicon layer, wherein the first sealing layer comprises monoaluminum phosphate, phosphoric acid, and a surfactant;
- and
- a second sealing layer disposed on the first sealing layer, wherein the second sealing layer comprises monoaluminum phosphate and phosphoric acid,
- wherein the first sealing layer and the second sealing layer are substantially free of phosphate glass.
3 more elements
Dependencies are inferred from the claim text.