Other

Societe Nationale D'etude Et De Construction De Moteurs D'aviation

Office National D'etudes Et De Recherche Aerospatiales (onera)

Societe Sochata

Societe Nationale D'etude Et De Construction De Monteurs D'aviation S.n.e.c.m.a. and Snecma Services

Serge Alexandre Alperine

Yann Philippe Jaslier

Jacques Louis Leger

Andr&eacute; Hubert Louis Malie

Jean-Pierre Julien Charles Huchin

Romain Portal

Pierre J Josso

Andre Hubert Malie

Jean-Paul Fournes

Yuri Tamarine

Denis Georges Manesse

Serge Gerzdev

A ceramic heat barrier coating is deposited on a substrate so that the coating has a columnar growth pattern which is interrupted and repeated a number of times throughout its thickness by successive regermination of the ceramic deposit. The regermination is obtained by a vapor phase deposition process wherein a polluting gas is introduced intermittently during the deposition of the ceramic. The resulting ceramic coating has a lower thermal conductivity than conventional columnar ceramic coatings.

Ceramic heat barrier coating having low thermal conductivity, and process for the deposition of said coating

A method of improving the oxidation and corrosion resistance of a superalloy article comprises providing a superalloy substrate having a sulphur content which is less than 0.8 ppm by weight, and depositing on the substrate a protective antioxidation coating having a sulphur content also less than 0.8 ppm by weight. A heat barrier layer may also be provided by depositing on the protective anti-oxidation coating a ceramic coating of columnar structure.

Method of improving oxidation and corrosion resistance of a superalloy article, and a superalloy article obtained by the method

A low thermal conductivity heat barrier coating deposited on a superalloy substrate is characterised in that it comprises a homogeneous mixture of oxides and has a composition containing a zirconia base, a zirconia-stabilizing oxide, and from 0.5 to 12 weight % of an additional metal element selected from nickel, cobalt, iron and mixtures thereof. The additional metal element may be added in an oxidised form, and the coating may also contain from 0.01 to 1 weight % of carbon.

Low thermal conductivity heat barrier coating, a metal article having such a coating, and a process for depositing the coating

A ceramic heat barrier coating is deposited on a substrate so that the coating has a columnar growth pattern which is interrupted and repeated a number of times throughout its thickness by successive regermination of the ceramic deposit. The regermination is obtained by a vapour phase deposition process wherein a polluting gas is introduced intermittently during the deposition of the ceramic. The resulting ceramic coating has a lower thermal conductivity than conventional columnar ceramic coatings.

A thermal barrier coating for a superalloy part used, in particular, in turbomachines comprises a ceramic coating and a sub-layer interposed between the superalloy substrate and the ceramic coating, the sub-layer being composed of a nickel and/or cobalt aluminide containing at least one platinum-like metal and at least one metal for promoting the formation of a layer of oxide constituted by the alpha-allotropic variety of alumina.

Thermal barrier coating with improved sub-layer and parts coated with

Growing community of inventors

Paris, France

Serge Alexandre Alperine