Protection against oxidation or corrosion of a hollow part made of a superalloy
AssigneeSafran
InventorsJérémy RAME, Amar SABOUNDJI, Mirna BECHELANY
Life of this patent
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Abstract
A protection method protects at least one hollow internal area of a turbine engine part made of a superalloy from oxidation and/or corrosion, wherein the at least one hollow inner area has been formed by means of at least one core made of a ceramic material limited by an external surface that surrounds it. Before bringing the superalloy around the core made of a ceramic material, the external surface is coated with a material that includes a nanometric layer of hafnium (Hf), and/or a micrometric layer of platinum (Pt), or a mixture at least of hafnium and platinum.
Claims10
A protection method, for protecting at least one hollow internal area of a turbine engine part made of a superalloy from oxidation and/or corrosion, said at least one hollow inner area having been formed by means of at least one core:
- made of a material comprising a ceramic and/or metal or a metal and ceramic hybrid material, and
- limited by an external surface which surrounds the at least one core, the method comprising the steps of:
- before bringing the superalloy around the core, coating said external surface with a coating material comprising hafnium (Hf), and/or platinum (Pt), and/or chromium (Cr) and/or silicon (Si) and/or Yttrium (Y), or a mixture thereof;
- before bringing the superalloy around the core, diffusing said coating material in the core between 800° C. and 1,250° C., under a pressure lower than 1 Pa;
- and
- after coating said external surface of the core with the coating material, bringing the molten superalloy in contact with said coated external surface.
(canceled)
Dependencies are inferred from the claim text.