Patent
Process for the manufacture of a composite material with refractory fibrous reinforcement and ceramic matrix
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TLDR
A thin, refractory, intermediate adhesive layer of laminar structure is deposited in oriented fashion on the reinforcing fibers by chemical vapor deposition, this intermediate layer having a greater elongation at break than the matrix and having a thickness of between 0.2 and 3 micrometers.Abstract:
A thin, refractory, intermediate adhesive layer of laminar structure is deposited in oriented fashion on the reinforcing fibers by chemical vapor deposition, this intermediate layer having a greater elongation at break than the matrix and having a thickness of between 0.2 and 3 micrometers; the material forming the intermediate layer can be laminar pyrocarbon or boron nitride; the ceramic matrix is then infiltered, preferably by chemical vapor deposition, inside the pores of the reinforcement.read more
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Fiber-containing composite
Marcus P. Borom,William B. Hillig,Raj N. Singh,William Arthur Morrison,Leonard V. Interrante +4 more
TL;DR: In this paper, the mixture is formed into a preform which is infiltrated with a molten solution of boron and silicon producing a composite containing borone nitride coated fibrous material.
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Filament-containing composite
TL;DR: In this paper, Boron nitride is coated on filaments of elemental carbon and/or silicon carbide, the coated filaments are contacted with an infiltration-promoting material containing elemental carbon to produce a preform wherein the filament are substantially parallel and each filament is enveloped with infiltrate-promote material.
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Process for making composite containing fibrous material
TL;DR: A composite is produced by forming tapes comprised of a mixture of infiltration-promoting material and organic binding material, disposing a layer of boron nitride coated fibrous material between at least two of the tapes forming a layered structure, laminating the layered structure to remove organic binding materials and infiltrating the resulting porous body with a solution of Boron and silicon as discussed by the authors.
Patent
Oxidation resistant ceramic matrix composites
TL;DR: Ceramic matrix composites having a boron containing oxygen-scavenging sealant-forming region coextensive with the internal fibers and interface debonding layer and a ceramic matrix material provide superior resistance to oxidation as discussed by the authors.
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Fiber reinforced composite product
TL;DR: In this paper, a fiber reinforced composite product is produced in accordance with a process in which yieldable, high strength carbon or graphite fibrous materials are formed into a substrate that has been optimized for final product application through the accurate control of its shape, cross-sectional configuration, density, fiber volume and internal fiber orientation.
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Composite article and method of making same
TL;DR: In this article, a method of composite article and a composite article specifically adapted for use in high temperature, corrosive and errosive environments comprising a carbon fibrous substrate, including a pyrolytic carbon sheath formed about each fiber of the substrate; a metallic carbide, oxide, or nitride compliant coating over the coated fibers of the substrates; and an impermeable metallic carbides, oxide or nitric outer protective layer formed about the entire periphery of the coated substrate.
Patent
Silicon carbide coated graphite members and process for producing the same
Elmer G Fatzer,Edgar L Kochka +1 more
TL;DR: A preferred process for producing coated isotropic graphite members comprises: A. HEAT TREATING the ISOTROPIC GRAPHITE MEMBER to a TEMPERATURE from about 1700*C to 2400*C in a halogen atmosphere comprising chlorine or fluorine to reduce the impurity ash content to the range of the order to 2 to 10 ppm, B. ULTRASONICALLY CLEANING the MACHINED graphite BODY in a LIQUID CLEANing FLuid to REMOVE LOOSE SURFACE PARTICLES, D
Patent
Self protecting carbon bodies and method for making same
TL;DR: In this article, a carbon body is composed of a thermochemically deposited coating which renders the body resistant to oxidation at high temperatures, and the coating is formed of a silicon alloy having a non-columnar grain distribution with substantially equiaxial grains of an average diameter of less than one micron.
Patent
Composite silicon carbide/silicon nitride coatings for carbon-carbon materials
TL;DR: In this article, a multilayer coating system for the protection of carbon-carbon composites is described, which includes an inner layer of SiC (produced by a conversion process in which Si is diffused into the carbon substrate) and an outer layer of CVD (chemically vapor deposited) Si3 N4.