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

Institut National Polytechnique De Toulouse

Nitruvid

C3f (compagnie Francaise De Forges Et Fonderies)

Centre National De La Recherche Scientifique

Essilor International

Francis Maury

Claudine Biver

Fernando Lomello

Michel Pons

Frédéric Schuster

Alexandre Michau

Raphaël Boichot

Roland Morancho

Jean-Francois Nowak

Aurélia Douard

Etienne Quesnel

Sylvie Vinsonneau

Laurent Bedel

Michel Jouve

Cyril Cayron

Djarollah Oquab

Frederic Schuster

Virginie Santucci

François Senocq

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

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

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

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

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).

Method of using DLI-MOCVD to provide a nuclear reactor component with a coating of amorphous chromium carbide

A method for diffusing metal particles including a composite layer deposited on a substrate, with the composite layer further including at least one dielectric matrix, and where the diffusion of the metal particles towards the substrate is achieved by means of a plasma treatment.

Method for diffusing metal particles within a composite layer

A method for depositing a hard metallic chrome coating or similar metal by chemical vapor deposition on a metallic substrate, includes: a) preparing a solution containing, in an oxygen-free solvent, i) a molecular compound of the bis(arene) family that's a precursor of the deposited metal with a decomposition temperature 300&#xb0; C.-550&#xb0; C., and ii) a chlorinated additive; b) introducing the solution as aerosol into a heated evaporator at a temperature between the solvent boiling temperature and the precursor decomposition temperature (PDT); and c) driving the vaporized aerosol from the evaporator towards a CVD reactor including a susceptor carrying the substrate, heated above the PDT, up to 550&#xb0; C., the evaporator and CVD reactor being subjected to atmospheric pressure. This DLI-CVD method performed at low temperature and atmospheric pressure enables continuous industrial treatment of large metallic plates, producing hard, monolayer or nanostructured multilayer metallic coatings. An appropriate injectable solution is also described.

Method for depositing hard metallic coatings

A method for depositing a non-oxide ceramic-type coating based on chrome carbides, nitrides or carbonitrides, by DLI-CVD at low temperature and atmospheric pressure on a metallic substrate, includes: a) a solution is prepared, containing a molecular compound which is a precursor of the metal to be deposited, belongs to the bis(arene) family, and has a decomposition temperature of 300&#xb0; C.-550&#xb0; C., the compound being dissolved in an oxygen atom depleted solvent; b) the solution is introduced as aerosol into a heated evaporator at a temperature between the solvent boiling temperature and the precursor decomposition temperature; and c) the precursor and the vaporized solvent are driven from the evaporator towards a CVD reactor having cold walls, with a susceptor carrying the substrate to be covered and heated to a temperature higher than the decomposition temperature of the precursor, to a maximum of 550&#xb0; C., the evaporator and the CVD reactor being at atmospheric pressure.

Process for deposition of non-oxide ceramic coatings

The object of the present invention is a deposition process of a coating of the ceramic type based on carbides, nitrides, or carbonitrides of metallic elements such as Cr, V, Zr, W, Mo, Co, Mn, Ni, Hf, Ta, Ti, Nb and Fe in which the coating of the ceramic type is deposited at low temperature in the vapour phase on a metallic substrate from organo-metallic precursors wherein, prior to this deposition in the vapour phase and without subsequent placing in contact with an oxidizing and/or polluting atmosphere, a reactive ionic pickling is carried out in a reducing atmosphere.

Deposition process of a ceramic coating on a metallic substrate

The object of the invention is a one-step deposition process of a coating of the ceramic type based on nitrides or carbonitrides of at least one metallic element selected from Cr, V, Zr, W, Mo, Co, Mn, Ni, Hf and Ta on a metallic or ceramic substrate, massive or obtained from fibres, by deposition in the vapor phase wherein a coating is deposited on the substrate by a chemical means at a pressure lower than 10 kPa at a temperature lower than 600.degree. C. and by using a system of precursors constituted simultaneously of:

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Labege, France

Francis Maury