Universite De La Rochelle

Snecma

Centre National De La Recherche Scientifique

Safran Aircraft Engines

Safran

Sr Technics Airfoil Services Limited

Fernando Pedraza Diaz

Justine Menuey

Baptiste Bouchaud

Josseline Balmain

Gilles Bonnet

Virginie Jaquet

Sarah Hamadi

Christophe Philippe Audic

Annie Pasquet

Billy Power

A turbomachine part includes a nickel-based superalloy substrate including, in mass content, 5.0% to 8.0% cobalt, 6.5% to 10% chromium, 0.5% to 2.5% molybdenum, 5.0% to 9.0% tungsten, 6.0% to 9.0% tantalum, 4.5% to 5.8% aluminum, hafnium in a mass content between 500 ppm and 1100 ppm, and optionally including niobium in a mass content less than or equal to 1.5%, and optionally at least one of carbon, zirconium and boron each in a mass content less than or equal to 100 ppm, the remainder being composed of nickel and unavoidable impurities.

Superalloy turbomachine part with an optimized hafnium content

The invention relates to a method of fabricating a thermal barrier comprising a ceramic coating layer covering at least a portion of the structure of a substrate, wherein the ceramic coating layer is deposited on the substrate solely by a cathodic electrodeposition process between at least one cathode () and at least one anode (), the substrate being formed of an electron-conducting material and constituting the cathode. In characteristic manner, the electrolyte () comprises at least one salt from the group comprising the salts of lanthanides, of yttrium, of zirconium, and of hafnium, such that the coating layer applied by the electrodeposition process includes at least one oxide from the group comprising the oxides of lanthanides, of yttrium, of zirconium, and of hafnium, and it also includes a step of heat treating the ceramic coating layer at a temperature lying in the range 400&#xb0; C. to 2000&#xb0; C. for a duration of at least 10 min.

Method of fabricating a thermal barrier

The invention relates to a part comprising a substrate made of an electron-conducting material and a coating over at least a portion of the surface of the substrate, the coating comprising a ceramic coating layer. In characteristic manner, said coating layer is based on cerium oxides and said coating layer presents oxygen vacancies at a concentration greater than or equal to 1&#xd7;10/cm. The invention is applicable to parts for high temperature applications, in particular in the field of aviation.

Part comprising a substrate carrying a ceramic coating layer

Growing community of inventors

La Rochelle, France

Fernando Pedraza Diaz