Methods of protecting metallic components against corrosion using chromium-containing thin films
OwnerThomas Knisley, Mark Saly +2inventors
InventorsThomas Knisley, Mark Saly, David Alexander Britz, David Thompson
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Abstract
Methods for depositing protective coatings on aerospace components are provided and include sequentially exposing the aerospace component to a chromium precursor and a reactant to form a chromium-containing layer on a surface the aerospace component by an atomic layer deposition process. The chromium-containing layer contains metallic chromium, chromium oxide, chromium nitride, chromium carbide, chromium silicide, or any combination thereof.
Claims20
A method for depositing a coating on an aerospace component, comprising:
- sequentially exposing the aerospace component to a chromium precursor and a reactant to form a chromium-containing layer on a surface of the aerospace component by an atomic layer deposition process;
- and
- forming a nanolaminate film stack on the surface of the aerospace component, wherein the nanolaminate film stack comprises alternating layers of the chromium-containing layer and a second deposited layer.
A method for depositing a coating on an aerospace component, comprising:
- forming a nanolaminate film stack on a surface of the aerospace component, wherein the nanolaminate film stack comprises alternating layers of a chromium-containing layer and a second deposited layer;
- sequentially exposing the aerospace component to a chromium precursor and a first reactant to form the chromium-containing layer on the surface by atomic layer deposition, wherein the chromium-containing layer comprises chromium oxide, chromium nitride, or a combination thereof;
- and
- sequentially exposing the aerospace component to a metal or silicon precursor and a second reactant to form the second deposited layer on the surface by atomic layer deposition, wherein the second deposited layer comprises aluminum oxide, aluminum nitride, silicon oxide, silicon nitride, silicon carbide, yttrium oxide, yttrium nitride, yttrium silicon nitride, hafnium oxide, hafnium nitride, hafnium silicide, hafnium silicate, titanium oxide, titanium nitride, titanium silicide, titanium silicate, or any combination thereof.
A method for depositing a coating on an aerospace component, comprising:
- sequentially exposing the aerospace component to a chromium precursor and a reactant to form a chromium-containing layer on a surface of the aerospace component by atomic layer deposition, wherein the surface of the aerospace component comprises nickel, nickel superalloy, chromium, iron, titanium, alloys thereof, or any combination thereof;
- forming a second deposited layer on the chromium-containing layer, wherein the second deposited layer comprises aluminum oxide, aluminum nitride, silicon oxide, silicon nitride, silicon carbide, yttrium oxide, yttrium nitride, yttrium silicon nitride, hafnium oxide, hafnium nitride, hafnium silicide, hafnium silicate, titanium oxide, titanium nitride, titanium silicide, titanium silicate, or any combination thereof;
- and
- forming a nanolaminate film stack on the surface of the aerospace component, wherein the nanolaminate film stack comprises alternating layers of the chromium-containing layer and the second deposited layer.
Dependencies are inferred from the claim text.