Aluminum-coated aluminum-lithium alloy, vapor deposition method thereof and solid propellant containing aluminum-coated aluminum-lithium alloy

The invention discloses an aluminum-coated aluminum-lithium alloy, a vapor deposition method thereof and a solid propellant containing the aluminum-coated aluminum-lithium alloy, and the aluminum-coated aluminum-lithium alloy sequentially comprises an aluminum-lithium alloy core, an aluminum coating film and an aluminum oxide coating film from inside to outside; the total thickness of the aluminum coating film and the aluminum oxide coating film is 0.5-1 [mu] m; specifically, trimethylaluminum is used, and an organic metal chemical vapor deposition method is adopted, so that the coating film is formed on the surface of the aluminum-lithium alloy; the aluminum-coated aluminum lithium alloy disclosed by the invention can be added into a solid propellant. The surface of the aluminum-lithium alloy is coated with aluminum to form a compact coating film, so that the influence of external water vapor on the aluminum-lithium alloy is effectively prevented and isolated, and the stability of the aluminum-lithium alloy