Onera (office National D'etudes Et De Recherches Aerospatiales)

Snecma

Snecma Moteurs

Onera

Safran Aircraft Engines

Serge Naveos

Pierre J Josso

Marie-Pierre Bacos

Justine Menuey

Annie Pasquet

Catherine Rio

Marie Pierre Bacos

Jason Nadler

Ariel Moriel

Carine Hoffmann

Sébastien Mercier

Aurélie Gregoire

Alexandra Boyer

Myriam Douin

Sebastien Mercier

Aurelie Gregoire

Ariel Morel

A method for forming a protective coating containing aluminum on the surface of a metal part, wherein the part is contacted with a carburizer made of an aluminum alloy, at a treatment temperature and in a chamber, the atmosphere of which contains an active gas which reacts with the carburizer to form a gaseous aluminum halide, which decomposes upon contacting the part while depositing aluminum metal thereon. In the method the aluminum alloy of the carburizer includes at least one element, zirconium and/or hafnium, the active gas reacting with the carburizer to also form a halide of the reactive element which decomposes upon contacting the part while depositing the element thereon at the same time as the aluminum.

Method for forming a protective coating containing aluminum on the surface of a metal part

The invention relates to a method of producing and joining superalloy balls by means of brazing and to objects produced with such joints. According to one aspect of the invention, an alloy powder covered with a brazing solder is bonded to a spherical core and subsequently transformed into a continuous alloy layer by means of brazing.

Method of producing and joining superalloy balls by means of brazing and objects produced with such joints

The invention relates to a method of brazing a Ti&#x2014;Al alloy. According to the invention, a layer of nickel () is disposed between a part () which is made from titanium aluminide and a brazing sheet (), such as to enable: the aforementioned part () to be brazed to another metallic material () without the aluminium diffusing from one to the other; and a stable link with good mechanical strength to be produced. The invention can be used for the assembly of aircraft engine parts which are made from titanium aluminide and nickel-based superalloy.

Method of brazing a Ti-Al alloy

This relates to an improvement to the process of aluminization or activated cementation in which a donor cement containing the aluminium is attacked at high temperature and in a neutral or reducing atmosphere by a gaseous ammonium halide to form a gaseous aluminium halide which decomposes on contact with a nickel-based substrate depositing aluminium metal thereon. According to the invention the aluminium halide is at least partly replaced by a zirconium halide leading to the inclusion of zirconium in the deposit. Improvement in the protection of the hot parts of aircraft engines made of nickel-based superalloy. No figure is to be published.

Process for forming a protective coating containing aluminium and zirconium on a metal

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Chatenay-Malabry, France

Serge Naveos