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

Institut National Polytechnique De Toulouse

Fernando Lomello

Frédéric Schuster

Michel Pons

Francis Maury

Alexandre Michau

Raphaël Boichot

Hicham Maskrot

Pierre-François Giroux

Pascal Aubry

Aziz Chniouel

Jean-Paul Garandet

Guilhem Roux

Yann Leconte

Mathieu Soulier

Guy Cheymol

Alain Billard

Mathieu Opprecht

Marion Le Flem

Jean-Christophe Brachet

Matthieu Le Saux

Isabel Idarraga-Trujillo

Fédéric Schuster

Ayoub Ladaci

Hicham Maskrot El Idrissi

Quentin Pouille

Elodie Vasquez

Khalil Abdelkebir

Marine Chaussiniac

Olivier Hercher

Jérôme Pradel

The invention is directed to a nuclear reactor component that includes i) a support containing a substrate based on a metal, the substrate being coated or not coated with an interposed layer positioned between the substrate and at least one protective layer and ii) a protective layer composed of a protective material, including partially metastable chromium, coating the support.

Nuclear reactor component having a coating of partially metastable chromium

A method for integrating a sensor into a metal part including creating, by additive printing, of a first portion of the part, including a volume for housing a sensor. The volume has a width greater than that of the sensor. The method also includes depositing the sensor in said housing volume and creating, by additive printing, a second portion of the part covering the sensor and forming a molten puddle in the housing volume, on either side of the sensor.

Method for integrating a sensor in a part made by additive manufacturing

Composite nuclear component comprising i) a support containing a substrate comprising a metallic material and a ceramic material (), the substrate () being coated or not coated with an interposed layer () positioned between the substrate () and at least one protective layer () and ii) the protective layer () composed of a protective material comprising chromium; the process comprising a step a) of vaporizing a mother solution followed by a step b) of depositing the protective layer () onto the support via a DLI-MOCVD deposition process. The composite nuclear component has improved resistance to oxidation and/or migration of undesired material. The invention also relates to the use of the composite nuclear component for combating oxidation and/or degradation of the ceramic material contained in the substrate.

Composite nuclear component, DLI-MOCVD method for producing same, and uses for controlling oxidation/hydridation

A method for manufacturing an aluminium alloy part by additive manufacturing comprising a step during which a layer of a mixture of powders is melted locally and then solidified, wherein the mixture of powders comprises: —first particles—comprising at least 80 wt % of aluminium and up to 20 wt % of one or more additional elements, and —second particles—of yttria, the volume percentage of second particles in the mixture of powders preferably ranging from 0.5% to 5%.

Method for manufacturing an aluminium alloy part by additive manufacturing and aluminium alloy part obtained according to the method

A method for producing a reinforced alloy powder containing a metal matrix in which crystalline oxide particles are dispersed, including: (i) providing a powder mixture including a parent metal powder including a master alloy for forming the metal matrix and an additional powder including an intermediate; (ii) milling the powder mixture by a mechanical synthesis process to make a precursor powder; and (iii) subjecting the precursor powder to a thermal plasma generated by a plasma torch including a plasma gas. The master alloy is iron-based, nickel-based, or aluminum-based. The intermediate is at least one of YFe, YO, FeO, FeTi, FeCrWTi, TiH, TiO, AlO, HfO, SiO, ZrO, ThO, and MgO. In (iii), the precursor powder is injected into the plasma torch at a flow rate of 10-30 g/min, a power of the plasma torch is 20-40 kW, and a pressure in a reaction chamber of the plasma torch is 25-100 kPa.

ODS alloy powder, method for producing same by means of plasma treatment, and use thereof

Part comprising a steel material whose constituent grains comprise a matrix in which precipitates are incorporated, the precipitates comprising at least one metallic element selected from a metallic element M, a metallic element M′, a metallic element M″ or mixtures thereof; the microstructure of the steel being such that the grains are equiaxed and the average grain size being such that the average of their largest dimension “D max” and/or the average of their smallest dimension “D min” is comprised between 10 μm and 50 μm. The steel material has optimised, stable and isotropic mechanical properties, in particular so that the steel material can best withstand mechanical and/or thermal stresses.

Part comprising an optimized steel material and its manufacturing process

Process for the manufacture of a steel material, wherein the grains of which it is composed comprise a matrix into which precipitates are incorporated, the precipitates comprising at least one metallic element selected from a metallic element M, a metallic element M′, a metallic element M″ or mixtures thereof; the microstructure of the steel being such that the grains are equiaxial and the average size of the grains being such that the average of their largest dimension “Dmax” and/or the average of their smallest dimension “Dmin” is in the range 10 μm to 50 μm. The steel material has optimised, stable and isotropic mechanical properties, in particular so that the steel material is more resistant to mechanical and/or thermal stresses.

Process for the manufacture of an optimised steel material

Process for manufacturing a composite nuclear component comprising i) a support containing a substrate comprising a metallic material and a ceramic material (), the substrate () being coated or not coated with an interposed layer () positioned between the substrate () and at least one protective layer () and ii) the protective layer () composed of a protective material comprising chromium; the process comprising a step a) of vaporizing a mother solution followed by a step b) of depositing the protective layer () onto the support via a DLI-MOCVD deposition process. Composite nuclear component comprising i) a support containing a substrate comprising a metallic material and a ceramic material (), the substrate () being coated or not coated with an interposed layer () positioned between the substrate () and at least one protective layer () and ii) the protective layer () composed of a protective material comprising chromium; the process comprising a step a) of vaporizing a mother solution followed by a step b) of depositing the protective layer () onto the support via a DLI-MOCVD deposition process. The composite nuclear component has improved resistance to oxidation and/or migration of undesired material. The invention also relates to the use of the composite nuclear component for combating oxidation and/or degradation of the ceramic material contained in the substrate.

Process for manufacturing a nuclear component comprising i) a support containing a substrate based on a metal (), the substrate () being coated or not coated with an interposed layer () positioned between the substrate () and at least one protective layer () and ii) the protective layer () composed of a protective material comprising chromium; the process comprising a step a) of vaporizing a mother solution followed by a step b) of depositing the protective layer () onto the support via a process of chemical vapor deposition of an organometallic compound by direct liquid injection (DLI-MOCVD).

Process of manufacture a nuclear component with metal substrate by DLI-MOCVD and method against oxidation/hydriding of nuclear component

Steel material whose constituent grains comprise a matrix in which precipitates are incorporated, the precipitates comprising at least one metallic element selected from a metallic element M, a metallic element M', a metallic element M&#x2033; or mixtures thereof; the microstructure of the steel being such that the grains are equiaxed and the average grain size being such that the average of their largest dimension 'Dmax' and/or the average of their smallest dimension 'Dmin' is comprised between 10 &#x3bc;m and 50 &#x3bc;m. The steel material has optimized, stable and isotropic mechanical properties, in particular so that the steel material can best withstand mechanical and/or thermal stresses.

Optimized steel material

A composite nuclear reactor component comprises a support and a protective layer (). The support contains a substrate () based on a metal. The substrate is coated with an interposed layer () positioned between the substrate () and the protective layer (). The protective layer () is composed of a material which comprises amorphous chromium carbide. The nuclear reactor component provides for improved resistance to oxidation, hydriding, and/or migration of undesired material.

Nuclear reactor component having a coating of amorphous chromium carbide

The invention relates to a nuclear fuel cladding comprising: i) a substrate containing a zirconium-based inner layer, optionally coated with at least one intermediate layer formed by at least one intermediate material selected from among tantalum, molybdenum, tungsten, niobium, vanadium, hafnium or the alloys thereof; and ii) at least one protective outer layer placed on the substrate and formed by a protective material selected from either chromium or an alloy of chromium. The nuclear fuel cladding produced using the method of the invention has improved resistance to oxidation/hydriding. The invention also relates to the method for the production of the nuclear fuel cladding by ion etching of the surface of the substrate and deposition of the outer layer on the substrate with a high power impulse magnetron sputtering method (HiPIMS), as well as to the use thereof to protect against oxidation and/or hydriding.

Nuclear fuel claddings, production method thereof and uses of same against oxidation/hydriding

Process for the chemical vapor deposition by DLI-MOCVD on a substrate of a protective coating composed of at least one protective layer comprising a transition metal M:

Method for depositing a coating by DLI-MOCVD with direct recycling of the precursor compound

Process for manufacturing a nuclear component that includes i) a support containing a substrate based on a metal, the substrate being coated or not coated with an interposed layer positioned between the substrate and at least one protective layer and ii) the protective layer composed of a protective material including partially metastable chromium; the process includes a step a) of vaporizing a mother solution followed by a step b) of depositing the protective layer onto the support via a process of chemical vapor deposition of an organometallic compound by direct liquid injection (DLI-MOCVD).

Nuclear component with metastable Cr coating, DLI-MOCVD method for producing same, and uses for controlling oxidation/hydridation

Process for manufacturing a nuclear component comprising i) a support containing a substrate based on a metal (), the substrate () being coated or not coated with an interposed layer () positioned between the substrate () and at least one protective layer () and ii) the protective layer () composed of a protective material comprising amorphous chromium carbide; the process comprising a step a) of vaporizing a mother solution followed by a step b) of depositing the protective layer () onto the support via a process of chemical vapor deposition of an organometallic compound by direct liquid injection (DLI-MOCVD).

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Gif-sur-Yvette, France

Fernando Lomello