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 mixture at least of hafnium and platinum.
Claims9
A protection method, for protecting at least one hollow inner 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 at least one 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 at least one core, diffusing said coating material in the at least one core between 800° C. and 1,250° C., under a pressure lower than 1 Pa;
- and
- after coating said external surface of the at least one core with the coating material, bringing the superalloy in a molten state in contact with said coated external surface.
Dependencies are inferred from the claim text.