Composite component with oil barrier coating
A coated component having a composite substrate and a coating system disposed thereon is provided. The coating system is substantially non-porous such that hydrocarbon fuel or other carbonaceous fluids are prevented from contacting and impregnating the polymer matrix composite material. The coating system can include an aluminum layer or a film layer comprising a polyethylene film or a polypropylene film. Also provided is a composite fan casing for a gas turbine engine having a polymer matrix composite substrate and a coating system disposed thereon. Methods for forming a containment assembly of a gas turbine engine are provided.
1. A coated component, comprising:
a composite fan casing substrate; and
a non-porous coating system disposed on the composite fan casing substrate, the coating system comprising at least one aluminum layer having a first side and an opposing second side, the first side being adhered to the composite fan casing substrate with an adhesive layer, and at least one film layer comprising both a polyethylene film and a polypropylene film, disposed on the second side of the at least one aluminum layer.
2. The component of claim 1 , wherein the composite fan casing substrate includes a polymer matrix composite substrate.
3. The component of claim 2 , wherein the polymer matrix composite substrate comprises a fiberglass polymer matrix composite substrate.
4. The component of claim 2 , wherein the polymer matrix composite substrate comprises a carbon fiber polymer matrix composite substrate.
5. The component of claim 1 , wherein a fiberglass ply layer is sandwiched between the composite fan casing substrate and the adhesive layer.
6. The component of claim 1 , wherein the adhesive layer is sufficiently thick so as to prevent galvanic corrosion of the at least one aluminum layer.
7. The component of claim 1 , wherein the adhesive layer comprises a heat seal adhesive.
8. The component of claim 7 , wherein the adhesive layer comprises an epoxy-based adhesive, an acrylate-based adhesive, or combinations thereof.
9. The component of claim 1 , wherein the at least one film layer is the outermost layer of the coating system.
10. The component of claim 1 , wherein the at least one film layer comprises Biaxially Oriented Polypropylene.
11. A composite fan casing for a gas turbine engine, the casing comprising:
a polymer matrix composite substrate; and
a substantially non-porous coating system disposed on the polymer matrix composite substrate, the coating system comprising at least one aluminum layer having a first side and an opposing second side, the first side being adhered to the composite substrate with an adhesive layer, and at least one film layer comprising a polyethylene film or a biaxially oriented polypropylene film, disposed on the second side of the at least one aluminum layer.
12. The composite fan casing of claim 11 , wherein the coating system is adhered to the polymer matrix composite substrate via an adhesive layer.
13. The composite fan casing of claim 11 , wherein the adhesive layer is sufficiently thick so as to prevent galvanic corrosion of the aluminum layer.
14. The composite fan casing of claim 11 , wherein the coating system comprises an aluminum layer adhered to the polymer matrix composite substrate with an adhesive layer, further wherein a fiberglass ply layer is sandwiched between the polymer matrix composite substrate and the adhesive layer.
15. The composite fan casing of claim 11 , wherein the at least one film layer is the outermost layer of the coating system.
16. The composite fan casing of claim 11 , wherein the at least one film layer comprises both a polyethylene and a polypropylene layer.
17. A method for forming a containment case of a gas turbine engine, comprising:
forming a fan containment case from a polymer matrix composite material;
coating the polymer matrix composite material with a coating system including an aluminum layer having a first side and an opposing second side, the first side being adhered to the polymer matrix composite material with an adhesive layer, a polyethylene film layer, and a polypropylene film layer, disposed on the second side of the aluminum layer; and
disposing the fan containment case about a plurality of fan blades of the gas turbine engine.
18. The method of claim 17 , comprising:
disposing an adhesive on the polymer matrix composite material with an adhesive layer to form the adhesive layer thereon for adhering the coating to the polymer matrix composite material with an adhesive layer.