Refractory-carbon composite brake friction elements
AssigneeDunlop Aerospace Limited
InventorDavid Callum Johnson
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Abstract
Refractory carbide particles are located in a defined area of a matrix, specifically silicon carbide particles are encapsulated within a porous matrix or carbon precursor, by locating particles of refractory carbide-forming material or a precursor thereof in a defined area of the matrix followed by depositing carbon within the matrix at a temperature below that of the melting point of the carbide-forming material.
Claims14
A method of forming a composite article comprising a carbon matrix containing refractory carbide particles, the method comprising the steps of:
- a) providing a porous matrix of carbon or carbon precursor material, the matrix comprising a laminate of two or more layers of the material, each layer having particles of a refractory carbide-forming material or precursor thereof distributed over an area thereof;
- and
- b) depositing carbon within the matrix at an elevated reaction temperature which is kept below the melting point of the carbide-forming material to form a distribution of the refractory carbide particles within the matrix at that area.
A method of forming a composite article comprising carbide particles in a matrix, the method comprising the steps of:
- a) providing a porous matrix comprising a laminate comprising two or more layers of carbon or carbon precursor material, each layer having particles of a carbide-forming material or a precursor thereof distributed over an area of the matrix;
- and
- b) depositing carbon within the matrix at an elevated reaction temperature which is kept below the melting point of the carbide-forming material whereby the carbide-forming material is converted in the solid state to the carbide within the matrix at that area.
An article comprising a carbon matrix having within the interior thereof refractory carbide particles, which are substantially individually encapsulated within deposited carbon.
Dependencies are inferred from the claim text.