Carbon fiber-reinforced article and method therefor
AssigneeUnited Technologies Corporation
InventorsMichael A. Kmetz, Sam Frueh
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Abstract
A method of fabricating a carbon fiber-reinforced article includes providing carbon fibers that have surfaces that include an initial interfacial bonding strength capacity with respect to bonding with boron nitride. The surfaces are then modified to reduce the initial interfacial bonding strength capacity. A layer of boron nitride is then deposited on the modified surfaces and the carbon fibers are then embedded in a ceramic matrix. A carbon fiber-reinforced article includes the carbon fibers, the layer of boron nitride on the surfaces of the carbon fibers, and the ceramic matrix. The article exhibits non-brittle fracture.
Claims18
A method of fabricating a carbon fiber-reinforced article, the method comprising:
- providing a plurality of carbon fibers, the plurality of carbon fibers including surfaces that have an initial interfacial bonding strength capacity with respect to bonding with boron nitride;
- modifying the surfaces to reduce the initial interfacial bonding strength capacity;
- depositing a layer of boron nitride on the modified surfaces;
- and
- embedding the plurality of carbon fibers in a ceramic matrix to provide a carbon fiber-reinforced article.
A carbon fiber-reinforced article comprising a plurality of carbon fibers, a layer of boron nitride on surfaces of the plurality of carbon fibers, and a ceramic matrix in which the plurality of carbon fibers are embedded, the plurality of carbon fibers having been modified prior to fabrication of the carbon fiber-reinforced article to reduce an initial interfacial bonding strength capacity of surfaces of the plurality of carbon fibers with respect to bonding with the boron nitride such that the carbon fiber-reinforced article exhibits non-brittle fracture.
A method of fabricating an oxidation-resistant carbon fiber, the method comprising:
- providing at least one carbon fiber, the at least one carbon fiber including a surface that has an initial interfacial bonding strength capacity with respect to bonding with boron nitride;
- modifying the surface to reduce the initial interfacial bonding strength capacity;
- and
- depositing a layer of boron nitride on the modified surface.
Dependencies are inferred from the claim text.