Coating for refractory alloy part

US11542586B2 · kind B2 · utility

Assignees

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR
• SAFRAN · FR

Inventors

• Mirna Bechelany · Courbevoie, FR
• Virginie Jaquet · Moissy-Cramayel, FR
• Amar SABOUNDJI · Moissy-Cramayel, FR
• Mathieu SOULIER · Le Saix, FR
• Mathieu Boidot · Gières, FR
• Richard Laucournet · La Buisse, FR

Key dates

• Filing date: Aug 7, 2019
• Grant date: Jan 3, 2023
• Expiry date: Aug 7, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C28/02
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A process for coating a part by chemical vapor diffusion is provided and includes placing a powder mixture in a chamber, immersing the part partially in the powder mixture, and applying a heat treatment to the part. The powder mixture includes a first component and a second component forming a gaseous compound during the heat treatment so as to allow deposition of the second component on the part. The part includes a metal refractory allow and the second component forms a solid diffusion alloy by solid diffusion with a metal species of the refractory metal alloy to generate a coating. The solid diffusion allow generates a passivating oxide layer when subjected to oxidizing conditions.