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US 9,126,873 B2Granted
Process for producing a self-healing layer on a part made of a C/C composite
AssigneeSnecma Propulsion Solide
InventorsPascal Diss, Eric Lavasserie
Life of this patent
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Abstract
In order to provide a self-healing layer on a composite material part, a composition is applied to the part, the composition containing: a suspension of colloidal silica; boron or a boron compound in powder form; silicon carbide in powder form; and at least one ultra-refractory oxide.
Claims9
A composite material part having a protective coating against oxidation, the protective coating comprising:
- a first self-healing phase formed in a majority by a borosilicate system,
- a second self-healing phase based on silicate, and
- a filler formed by silicon carbide grains,
- wherein said second self-healing phase includes at least one ultra-refractory oxide, the at least one ultra-refractory oxide being Y2O3,
- wherein, in a softened state, the second self-healing phase based on silicate and including the at least one ultra-refractory oxide spreads in a form of drops and surrounds the silicon carbide grains, each drop surrounding a silicon carbide grain, so as to mitigate a loss of ability to wet carbon and maintain a protective film of the second self-healing phase in contact with a surface of the part.
2 more elements
Dependencies are inferred from the claim text.