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

Centre National De La Recherche Scientifique

Commissariat a L'energie Atomique

Institut National Polytechnique De Grenoble

Nicolas Eustathopoulos

Jean-Paul Garandet

Denis Camel

Béatrice Drevet

Charles Huguet

Johann Testard

Rayisa Voytovych

Rana Israel

Adrien Gasse

A substrate characterised in that it is at least partially surface-coated with a coating containing at least one so-called 'barrier' layer having silica and one or more material(s) X selected from among SiC, Si, SiN, in which layer the amount of X varies between 25-wt. % and 50.-wt. % in relation to the total weight of the barrier layer, the barrier layer being formed by grains of one or more materials X covered at least partially in a silica shell, and the barrier layer being in direct contact with the substrate.

Substrate with low-permeability coating for the solidification of silicon

A substrate, in particular intended for contact with liquid silicon, wherein it is at least partially surface-coated with a multilayer coating formed by: at least one layer, known as the adhesion layer, contiguous with the substrate, having an open porosity of at least 30%, and formed of a material comprising silica and silicon nitride, said material having a silica content of between 10 wt.-% and 55 wt.-% in relation to the total weight thereof; and a layer different from the adhesion layer, known as the release layer, located on the surface of the adhesion layer and formed of a material including silica and silicon nitride, said material having a silica content of between 2 wt.-% and 10 wt.-% in relation to the total weight thereof.

Substrate for solidifying a silicon ingot

The present invention relates to novel materials intended for being contacted with liquid silicon and having a multilayer architecture, the intermediate layer of which is formed by a silicon carbide matrix containing at least one carbon nodule. The invention also relates to the method for preparing said materials.

Material having a multilayer architecture and intended for being contacted with liquid silicon

The present invention relates to a method of assembling carbon parts using a braze based on silicon carbide. The invention also relates to the parts assembled using such a method.

Method of assembling carbon parts by refractory brazing

A refractory braze composition and process for assembling alumina-containing parts to another alumina-based material, metal or a metal alloy by reactive or non-reactive refractory brazing using a braze composition provide assemblies entirely of alumina or containing alumina and a metal or metal alloy. The braze composition is non-reactive with alumina or a reactive composition, whose reactivity with alumina is controlled, and it is formed of aluminium, of titanium, and of a matrix made up either of palladium, or of nickel, or of a nickel and palladium alloy.

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Grenoble, France

Nicolas Eustathopoulos