Method of forming heat engine parts made of a superalloy and having a metallic-ceramic protective coating

US5124006A · kind A · utility

Assignees

• Societe Nationale d'Etude et de Construction de Moteurs d'Aviation - S.N.E.C.M.A · FR
• Association Pour La Recherche Developpement Des Methodes Et Processus Industriels · FR

Inventors

• Dominque M. M. Fayeulle · Charenton-le-Pont, FR
• Jean-Paul Henon · Versailles, FR
• Rene J. Morbioli · Corbeil, FR

Key dates

• Filing date: Sep 17, 1990
• Grant date: Jun 23, 1992
• Expiry date: Sep 17, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12611
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method for coating a heat engine part, particularly a turbo-machine part made of a superalloy and adapted for use in aeronautical applications, comprises electrophoretically depositing a metallic structure of cellular form with uniformly disposed cells of predetermined size. The deposition is performed using an electrophoresis bath containing methanol, aluminum chloride as an electrolyte, and a powder containing Cr, Al, Y, Ta and Ni. The cellular metallic structure is consolidated by a sintering treatment, which may be reactive, or metallization, preferably in the vapor phase, and the coating is completed by applying a ceramic material by plasma spraying.