Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Commissariat a L'energie Atomique

Herakles

Safran Ceramics

Philippe Bucci

Emmanuel Rigal

Eric Philippe

Eric Conete

Magali Reytier

Guilhem Roux

Thomas Revel

Guillaume De Dinechin

Jean-Marc Leibold

Philippe Aubert

Pierre-Eric Frayssines

A method of assembling together by brazing first and second parts made of composite material, each of the first and second parts having an assembly face for brazing with the assembly face of the other part, the method including making at least one perforation in the assembly face of the first part; interposing capillary elements between the assembly faces of the first and second parts made of composite material; placing the first and second parts facing each other while inserting a peg in each perforation of the first part; placing a brazing composition in contact with a portion of the capillary elements; and applying heat treatment to liquefy the brazing composition so as to cause the molten brazing composition to spread by capillarity between the assembly faces of the composite material parts.

Method for the brazing of parts made from a composite material, incorporating a slug in the bond

A manufacturing method for a module having a hollow region, including: making an assembly including at least one recessed plate having a recess open at one face, defining thereon a recess outline and, between the face and the immediately adjacent plate of the assembly, a strand of material lying along the recess outline; treating the assembly, aiming to obtain diffusion bonding of the strand to the plate(s) with which it is in contact, to constitute, along its associated recess outline, a gas-tight connection of the two plates between which it is placed; and consolidating the assembly by hot isostatic pressing.

Method for manufacturing a module with a hollow region, preferably for fluid circulation

A nuclear fusion reactor first wall component includes a copper alloy element, an intermediate metal layer made from niobium and a beryllium element, directly in contact with the intermediate metal layer. The intermediate niobium layer is further advantageously associated with a mechanical stress-reducing layer formed by a metal chosen from copper and nickel. This mechanical stress-reducing layer is in particular arranged between the intermediate niobium layer and the copper alloy element. Furthermore, when the mechanical stress-reducing layer is made from pure copper, a layer of pure nickel can be inserted between the niobium and the pure copper before diffusion welding. Such a component presents the advantage of having an improved thermal fatigue behavior while at the same time preventing the formation of intermetallic compounds at the junction between the beryllium and the copper alloy.

Nuclear fusion reactor first wall component and production process thereof

A device including a metal substrate and a ceramic substrate including a back-tapered groove separated from each other by a sealed flexible link. The link includes: a metal element including an end connected to the metal substrate and at another end housed in the groove of the ceramic substrate, the metal element being elastically deformable both in the groove along a direction radial to the groove and, in the separation space between the metal substrate and the ceramic substrate along the separation direction, and a joint-forming mass with a greater thermal expansion coefficient than that of the ceramic substrate and adhesively bonded to the end of the metal element housed in the back-tapered groove, the joint fitting with direct contact a portion of the height of convergent sidewalls of the groove.

Sealed flexible link between a metal substrate and a ceramic substrate, method for making such a link, application of the method to sealing high temperature electrolyzers and fuel cells

A method for making a component including fluid flow channels formed by making a plurality of grooves (), in at least one face () of a base plate (); having opposite ends so that the grooves have open top sides; scalably blocking the open top side of each groove and diffusion-welding a lid by hot isostatic compression onto the face () of the base plate () to cover each of the strips leaving open the fluid flow channels at one or both opposite ends of the base plate for allowing pressurized gas to penetrate into the flow channels.

Method for making a component including fluid flow channels

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Engins, France

Philippe Bucci