Commissariat a L'energie Atomique Et Aux Energies Alternatives

Commissariat a L'energie Atomique

Emmanuel Rigal

Magali Reytier

Michel Planque

Philippe Bucci

Jean-Marc Leibold

Fabien Vidotto

Olivier Gillia

Charlotte Bernard

André Chatroux

Raphael Couturier

Lionel Cachon

Raphaël Couturier

Guillaume De Dinechin

Marie Petitjean

Philippe Aubert

Isabelle Moro-Le Gall

Alain Bengaouer

Pierre-Eric Frayssines

H&eacute;l&egrave;ne Burlet

Julien Cigna

Mathieu Monteremand

Isabelle Chu

Sébastien Chomette

Julien Ducamp

A method for producing heat exchangers having at least two fluid circuits each having channels, including the following steps: producing one or a plurality of elements of a first fluid circuit, each element having at least two metal plates, at least one of which has first grooves; stacking the at least two metal plates of each element in such a way that the first grooves form the channels of the first circuit; assembling each element of the first circuit by diffusion welding between the two stacked metal plates; producing one or a plurality of elements of at least one second fluid circuit, each element of the second circuit having at least a portion of the channels of the second circuit; assembling, either by diffusion welding, or by brazing, or by diffusion brazing between the element or elements of the first circuit and the element or elements of the second circuit.

Method for producing a heat exchanger module having at least two fluid flow circuits

The present invention relates to an novel method of producing heat exchangers having at least two fluid circuits each comprising channels, the method employing diffusion bonding achieved using the hot isostatic pressing (HIP) technique, and to a heat exchanger obtained using this method.

Method for producing a heat exchanger module with at least two fluid circulation circuits and heat exchanger obtained using this method

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 method for manufacturing a module with a hollow area by hot isostatic compression, including: making an assembly including superposed elements defining the hollow area, the assembly forming a sealed casing containing the hollow area, including at least one meltable obturation member separating the hollow area from the outside of the assembly; followed by hot isostatic compression of the assembly, to obtain diffusion-welding of its elements, by letting temperature and pressure conditions change over time to cause a rupture of the meltable obturation member allowing pressurization gas to penetrate into the hollow area.

Method for manufacturing a module with a hollow area by hot isostatic compression

A seal intended to be inserted between a first and a second member, the seal including: two contact portions spaced from each other along a spacing direction, respectively intended to contact in a tight manner the first and second members, the contact portions being made of a first alloy displaying superplasticity properties under predetermined stress conditions including predetermined temperature conditions, the contact portions being supported by a support arranged therebetween, produced so as to display, under the predetermined temperature conditions, a greater mechanical compression resistance in the spacing direction than that of the contact portions.

Superplastic sealing system, preferentialy for electrochemical cell system

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

The present invention relates to a diffusion welding assembly process between a martensitic stainless steel and a copper alloy, and in particular, to an assembly process of a martensitic stainless steel component with a component comprising copper. Said process may be used for example to produce a bimetal part designed to operate at high temperatures. It particularly comprises a step consisting of degreasing and stripping the surfaces of the components to be assembled, a step consisting of placing the degreased and stripped surfaces of the components to be assembled in direct contact and a step consisting of diffusion welding assembly.

Method for assembling by diffusion welding a martensite stainless steel and a copper alloy and resulting bimetal element

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Sassenage, France

Emmanuel Rigal