Commissariat a L'energie Atomique

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Joël Toulc'Hoat

Luc Bianchi

Philippe Belleville

Bruno Pintault

Karine Valle

David Guenadou

Christophe Boscher

Charles Bories

The invention relates to a composite material element (), the composite material comprising a microfissured matrix () in the form of a three-dimensional interconnected network () of microfissures exposed on the surface of the ceramic matrix, an additive material () consisting of a flux or glass being dispersed in the matrix, the additive material () being a material which, when the composite material is brought to a predetermined temperature, softens and migrates by capillarity in the network () of microfissures () to said surface of the element. The quantity of additive material dispersed initially in the matrix is in a sufficient proportion compared to the matrix intended to coat a surface () of the composite material element left exposed so as to create a gas-tight barrier.

Solid joint obtained by heat projection

Process for producing at least one nanoporous layer of nanoparticles chosen from nanoparticles of a metal oxide, nanoparticles of metal oxides, and mixtures of said nanoparticles, on a surface of a substrate, in which at least one colloidal sol, in which said nanoparticles are dispersed and stabilized, is injected into a thermal plasma jet which sprays said nanoparticles onto said surface. Nanoporous layer and device, especially a separation device, comprizing said layer.

Process for producing a nanoporous layer of nanoparticles and layer thus obtained

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Joue les Tours, France

Joël Toulc'Hoat