Abstract: A method of making a deposit on a component made of a nickel or cobalt based superalloy is described wherein a deposit material consisting of reactive powders corresponding to an intermetallic material or of a superalloy powder is deposited on the component before placing it in a chamber and subjecting it to a neutral gas at a hydrostatic pressure of up to 1.5 GPa, the chamber being provided with heater means for producing a controlled temperature of up to 1200.degree. C. at a rate of increase of from 5.degree. C. to 120.degree. C. per minute and a thermal gradient of 200.degree. C. between the ends of the component, and the temperature and pressure conditions in the chamber are selected such that the deposit material undergoes a synthesis reaction by self-propagated combustion under high pressure so as to obtain densification of the deposit and a metallurgical bonding between the deposit and the component.
Type:
Grant
Filed:
August 21, 1997
Date of Patent:
September 21, 1999
Assignee:
Societe Sochata
Inventors:
Marie-Caroline Dumez, Jean-Pierre Huchin, Rose Marie Marin-Ayral, Didier Perraud, Jean-Claude Tedenac
Abstract: 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.
Type:
Grant
Filed:
February 27, 1997
Date of Patent:
December 1, 1998
Assignees:
Societe Nationale D'Etude et de Construction de Moteurs D'Aviation "Snecma", Societe Sochata, Office National d'Etudes et de Recherche Aerospatiales (ONERA)
Inventors:
Serge Alexandre Alperine, Jean-Paul Fournes, Pierre Josso, Jacques Louis Leger, Andre Hubert Louis Malie, Denis Georges Manesse
Abstract: Metal powder for recoating a superalloy part by a diffusion brazing heat treatment is deposited on the part by electrophoresis in a bath comprising an aqueous solution of from 7.5 to 17.5 g/1 of a natural gum based binder and, in dispersion in the solution, from 1.75 to 2.25 kg/1 of a known mixture of two metal powders suitable for the recoating.
Abstract: Metal powder for recoating a superalloy part by a diffusion brazing heat treatment is deposited on the part by electrophoresis in a bath comprising an aqueous solution of from 7.5 to 17.5 g/l of a natural gum based binder and, in dispersion in the solution, from 1.75 to 2.25 kg/l of a known mixture of two metal powders suitable for the recoating.