Solid joint obtained by heat projection
First Claim
1. A composite material element, the composite material element comprising a microfissured ceramic matrix forming a three-dimensional interconnected network of microfissures created by relaxation of thermal stresses and exposed on a surface of the matrix, the microfissured ceramic matrix consisting of at least one material chosen from among metal, metallic alloys, metallic oxides, carbides, nitrides, silicides and borides, a quantity of additive material consisting of at least one material chosen from among a glass, a ceramic flux, a metal and a metallic alloy, being dispersed in the matrix, the additive material being a material chosen to soften and migrate by capillarity in the network of microfissures to a surface of the element when the composite material element is brought to a predetermined temperature, the quantity of additive material dispersed in the matrix being in a sufficient proportion, compared to the matrix, to coat a surface of the composite material element left exposed so as to create there a gas-tight barrier.
1 Assignment
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Accused Products
Abstract
The invention relates to a composite material element (1), the composite material comprising a microfissured matrix (7) in the form of a three-dimensional interconnected network (4) of microfissures exposed on the surface of the ceramic matrix, an additive material (6) consisting of a flux or glass being dispersed in the matrix, the additive material (6) being a material which, when the composite material is brought to a predetermined temperature, softens and migrates by capillarity in the network (4) of microfissures (4) 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 (5) of the composite material element left exposed so as to create a gas-tight barrier.
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Citations
15 Claims
- 1. A composite material element, the composite material element comprising a microfissured ceramic matrix forming a three-dimensional interconnected network of microfissures created by relaxation of thermal stresses and exposed on a surface of the matrix, the microfissured ceramic matrix consisting of at least one material chosen from among metal, metallic alloys, metallic oxides, carbides, nitrides, silicides and borides, a quantity of additive material consisting of at least one material chosen from among a glass, a ceramic flux, a metal and a metallic alloy, being dispersed in the matrix, the additive material being a material chosen to soften and migrate by capillarity in the network of microfissures to a surface of the element when the composite material element is brought to a predetermined temperature, the quantity of additive material dispersed in the matrix being in a sufficient proportion, compared to the matrix, to coat a surface of the composite material element left exposed so as to create there a gas-tight barrier.
Specification