Method of improving oxidation and corrosion resistance of a superalloy article, and a superalloy article obtained by the method
AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
InventorsYann Jaslier, Serge Alexandre Alperine, Jacques Louis Leger
Life of this patent
Estimating the term…
Abstract
A method of improving the oxidation and corrosion resistance of a superalloy article comprises providing a superalloy substrate having a sulphur content which is less than 0.8 ppm by weight, and depositing on the substrate a protective antioxidation coating having a sulphur content also less than 0.8 ppm by weight. A heat barrier layer may also be provided by depositing on the protective anti-oxidation coating a ceramic coating of columnar structure.
Claims17
A method of improving the oxidation and corrosion resistance of an article made of a superalloy having a base of nickel and/or cobalt and/or iron, comprising:
- providing a substrate of said superalloy having a sulfur content less than 0.8 ppm by weight;
- and depositing on said substrate a protective antioxidation coating having a sulfur content less than 0.8 ppm by weight, wherein said protective coating is an aluminide coating.
Dependencies are inferred from the claim text.