Snecma

Universite De La Rochelle

Josseline Balmain

Justine Menuey

Fernando Pedraza Diaz

Baptiste Bouchaud

Gilles Bonnet

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.

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La Rochelle, France

Josseline Balmain