Abstract: The present disclosure generally relates to systems and methods for composites, including carbon fiber-metal composites. In some cases, the composites may be formed from one, two, or more layers of metals or other substrates, sandwiching a plurality of aligned fibers. The fibers may be substantially aligned, and may be present at relatively high densities within the composite. The composites may be prepared, in some aspects, by dispersing fibers by neutralizing the electrostatic interactions between the fibers, for example using aqueous liquids containing the fibers that are able to neutralize the electrostatic interactions that typically occur between the fibers. In some cases, the fibers may be aligned using techniques such as shear flow and/or magnetism. Other aspects are generally directed to methods of using such composites, kits including such composites, or the like.

Abstract: An airfoil for a gas turbine engine defining a spanwise direction, a root end, a tip end, a leading edge end, and trailing edge end is provided. The airfoil includes: a body extending along the spanwise direction between the root end and the tip end, the body formed of a composite material; and a sculpted leading edge member attached to the body positioned at the leading edge end of the airfoil, the sculped leading edge member formed at least in part of a metal material and defining a non-linear patterned leading edge of the airfoil.

Abstract: Disclosed herein is a structure that comprises a tank including an outer cylindrical surface and a domed end. The structure also comprises a tank skirt positioned circumferentially around the tank. A wall of the tank and a wall of the tank skirt form two sides of a y-joint between the tank and the tank skirt. The y-joint includes a wedge structure positioned between the tank and the tank skirt. Additionally, a thickness of at least one of the wall of the tank or the wall of the tank skirt forming the y-joint tapers such that the thickness of the at least one of the wall of the tank or the wall of the tank skirt that tapers has a greater thickness at the y-joint than away from the y-joint.

Abstract: An article for high temperature service is presented herein. One embodiment is an article including a substrate having a silicon-bearing ceramic matrix composite; and a layer disposed over the substrate, wherein the layer includes silicon and a dopant, the dopant including aluminum. In another embodiment, the article includes a ceramic matrix composite substrate, wherein the composite includes a silicon-bearing ceramic and a dopant, the dopant including aluminum; a bond coat disposed over the substrate, where the bond coat includes elemental silicon, a silicon alloy, a silicide, or combinations including any of the aforementioned; and a coating disposed over the bond coat, the coating including a silicate (such as an aluminosilicate or rare earth silicate), yttria-stabilized zirconia, or a combination including any of the aforementioned.

Abstract: A transition structure includes a metallic portion, a fiber portion including a plurality of tows embedded within the metallic portion and extending out from the metallic portion forming a fabric, and a binding material forming a matrix surrounding the fiber portion embedded within the metallic portion. The fiber portion may be attached to or form part of a composite vehicle component. The transition structure may join a metallic component and a composite component. The transition structure may be manufactured by creating first channels within a layer of a metallic substrate, inserting fiber tows into the first channels, placing a first metallic layer over the metallic substrate and the fiber tows, consolidating the metallic layer to the metallic substrate, and binding the fiber tows within a resin. Prior to binding, additional layers of channels and fiber tows may be consolidated onto the first metallic layer.

Abstract: A method of manufacturing a metal hybrid, heat-dissipating material includes the steps of (a) preparing a spherical metal powder and a flake graphite powder having an aspect ratio greater than 1, respectively; (b) preparing a powder mixture by inserting only the spherical metal powder and the flake graphite powder into a container, followed by dry mixing the powder mixture using a multi-axial mixing method for rotating or vibrating the container about two or more different rotation axes without any liquid input and without any mixing aids; (c) manufacturing a green compact by pressing the powder mixture; and (d) sintering the green compact to provide the metal hybrid, heat-dissipating material.

Abstract: A method for the manufacture of a carbon composite comprises compressing a combination comprising carbon and a binder at a temperature of about 350° C. to about 1200° C. and a pressure of about 500 psi to about 30,000 psi to form the carbon composite; wherein the binder comprises a nonmetal, metal, alloy of the metal, or a combination thereof; wherein the nonmetal is selected from the group consisting of SiO2, Si, B, B2O3, and a combination thereof; and the metal is selected from the group consisting of aluminum, copper, titanium, nickel, tungsten, chromium, iron, manganese, zirconium, hafnium, vanadium, niobium, molybdenum, tin, bismuth, antimony, lead, cadmium, selenium, and a combination thereof.

Abstract: To provide a low-cost friction material which is able to secure the required braking performance, the fading resistance, the wear resistance, and the adhesive strength between the friction material and the back plate while satisfying laws and regulations relating to the required amount of the content of the copper component contained therein. The friction material for the disc brake pad which is manufactured by forming a non-asbestos-organic (NAO) friction material composition that includes no copper component, in which the friction material composition includes no titanate but includes (a) 8-15 volume % of an inorganic friction modifier having the average particle diameter of 0.

Abstract: There is provided with a fiber-reinforced laminate. The fiber-reinforced laminate has a first fiber-reinforced layer and a second fiber-reinforced layer. The fiber-reinforced laminate also has a metal layer provided between the first fiber-reinforced layer and the second fiber-reinforced layer.

Abstract: A composite is provided having an electrically conducting Al matrix and elongated filaments comprising Ca and/or Sr and/or Ba disposed in the matrix and extending along a longitudinal axis of the composite. The filaments initially comprise Ca and/or Sr and/or Ba metal or alloy and then may be reacted with the Al matrix to form a strengthening intermetallic compound comprising Al and Ca and/or Sr and/or Ba. The composite is useful as a long-distance, high voltage power transmission conductor.

Abstract: An object of the present invention is to provide a carbon fibrous structure having good dispersibility and small variations in electrical conductivity, etc., and being capable of improving physical properties such as electrical properties, mechanical properties and thermal properties by a small amount addition thereof without impairing properties of a matrix.

Abstract: A method for making a multilayer foam structure of nominally-aligned carbon nanotubes (CNTs) is disclosed. The method comprises synthesizing a layer of CNTs and sandwiching the layer of CNTs between two polymeric layers, or between two metallic layers or foils.

Abstract: A thermal interface material includes a mechanically compliant vertically aligned nanofiber film and a binder material for joining the nanofibers of the film to the surfaces of two substrates. Preferably, the binder material comprises a non-hydrocarbon-based material such as a metallic eutectic with a melting temperature below a nanofiber thermal damage threshold temperature of the film. The film is grown on a substrate which is then bonded to another substrate by the binder material in an adhesion process that may include pressure and heat. Alternatively, the film may be released from the substrate to produce a stand-alone thermal tape which may later be placed between two substrates and bonded.

Abstract: A method of producing a carbon fiber-metal composite material includes: (a) mixing an elastomer, a reinforcement filler, and carbon nanofibers, and dispersing the carbon nanofibers by applying a shear force to obtain a carbon fiber composite material; and (b) replacing the elastomer in the carbon fiber composite material with a metal material, wherein the reinforcement filler improves rigidity of at least the metal material.

Abstract: A process for the impregnation of carbon fiber bundles enables the carbon fiber bundles to be impregnated with a curable liquid resin without the impregnated fiber bundles sticking together. The fiber bundles are present in a mechanically generated fluidized bed during the impregnation and are held in the fluidized bed until the resin has been cured or at least dried. A resin-impregnated carbon fiber bundle, a shaped body and an intermediate body for silicization are also provided.

Abstract: In various embodiments, composite materials containing a metal matrix having at least one metal and a carbon nanotube-infused fiber material are described herein. Illustrative metal matrices include, for example, aluminum, magnesium, copper, cobalt, nickel, zirconium, silver, gold, titanium and various mixtures thereof. The fiber materials can be continuous or chopped fibers and include, for example, glass fibers, carbon fibers, metal fibers, ceramic fibers, organic fibers, silicon carbide fibers, boron carbide fibers, silicon nitride fibers and aluminum oxide fibers. The composite materials can further include a passivation layer overcoating at least the carbon nanotube-infused fiber material and, optionally, the plurality of carbon nanotubes. The metal matrix can include at least one additive that increases compatibility of the metal matrix with the carbon nanotube-infused fiber material. The fiber material can be distributed uniformly, non-uniformly or in a gradient manner in the metal matrix.

Abstract: In various embodiments, composite materials containing a ceramic matrix and a carbon nanotube-infused fiber material are described herein. Illustrative ceramic matrices include, for example, binary, ternary and quaternary metal or non-metal borides, oxides, nitrides and carbides. The ceramic matrix can also be a cement. The fiber materials can be continuous or chopped fibers and include, for example, glass fibers, carbon fibers, metal fibers, ceramic fibers, organic fibers, silicon carbide fibers, boron carbide fibers, silicon nitride fibers and aluminum oxide fibers. The composite materials can further include a passivation layer overcoating at least the carbon nanotube-infused fiber material and, optionally, the plurality of carbon nanotubes. The fiber material can be distributed uniformly, non-uniformly or in a gradient manner in the ceramic matrix. Non-uniform distributions may be used to form impart different mechanical, electrical or thermal properties to different regions of the ceramic matrix.

Abstract: A material having a stretch axis and adapted to regulate energy by distributing and partially dissipating energy exerted thereon. The material includes a material body elongateable along the stretch axis from a first position to a second position, in which the material body is elongated by a predetermined amount relative to the first position. The material body includes a first elastomer layer defining a material length and a planar support structure disposed within the elastomer layer generally along the stretch axis in an at least partially non linear fashion while the material body is in the first position so that a length of the support structure, as measured along a surface thereof, is greater than the material length of the first elastomer layer.

Abstract: A shock and vibration isolator device has one or more connecting elements of a superelastic shape memory alloy composite material extending between a base member, configured to mount to a structure or ground, and a mounting member, configured to support equipment or machinery. The superelastic shape memory alloy composite material is formed of a plurality of superelastic wires embedded in an elastomeric matrix material.

Abstract: A composite material being excellent in heat conductivity is provided. In order to realize this, a fibrous carbon material made of fine tube form structures constituted with single-layer or multiple-layer graphene is present to form a plurality of layers within a substrate made from a spark plasma sintered body of a metal powder, a mixed powder of a metal and ceramics, or a ceramic powder. The fibrous carbon material constituting each layer is made of a mixture obtained by mixing a small amount of a small diameter fiber 2 having an average diameter of 100 nm or less with a large diameter fiber 1 having an average diameter of 500 nm to 100 ?m.

Abstract: To provide a carbon fiber Ti—Al composite material having hardness, heat resistance and abrasion resistance, having reduced weight and improved strength and thermal conductivity and being excellent in uniformity of the quality. A carbon fiber Ti—Al composite material which is prepared by pressure impregnating a molded product containing fine carbon fibers having a fiber diameter of from 0.5 to 500 nm and a fiber length of at most 1,000 ?m and having a hollow-structured central axis and a titanium powder or a titanium oxide powder, with aluminum or an aluminum alloy by molten metal forging.

Abstract: A semifinished product of composite material consists of a metallic matrix material and high tensile strength fibers embedded in the matrix material, whereby the metallic matrix material is formed of titanium or a titanium based alloy. Ceramic particles are encased or embedded in the matrix material for increasing the strength of the semifinished product with respect to torsional loading or transverse loading. The product is produced by a method in which the fibers are coated with the matrix material, ceramic particles are embedded in the matrix material coating the fibers, and then the thusly coated fibers are arranged in a desired geometry and are consolidated to form the product.

Abstract: The present invention provides a resin composition comprising a thermoplastic resin (A), an inorganic compound having a volume resistance of less than about 10?3 ?·m and relative permeability of more than about 5,000 (B) and fiber filler (C). The resin composition of the present invention can have high impact strength and high electrical conductivity, and high electromagnetic interference (EMI) and radio frequency interference (RFI) shielding properties. The resin composition of the present invention can accordingly have multiple functions and can be used for electrical/electronic devices.

Abstract: An composite material is disclosed, which includes carbon fibrous structures which are capable of being included in a relatively large amount in the composite material, and which are capable of improving the physical properties, such as electric, mechanical, or thermal properties. The carbon fibrous structure comprises (a) carbon fibrous structures each of which comprises a three dimensional network of carbon fibers, each of the carbon fibers having an outside diameter of 15-100 nm, wherein the carbon fibrous structure further comprises a granular part, at which the carbon fibers are bound in a state that the carbon, fibers are extended outwardly therefrom, and wherein the granular part is produced in a growth process of the carbon fibers, and (b) an material other than the carbon fibrous structures, wherein the amount of carbon fibrous structures added is more than 30% and not more than 100% by weight of the total weight of the composite.

Abstract: A fiber-reinforced component is formed of a first composite member including a metal matrix with reinforcing fibers having a diameter and a length distributed therein in a selected orientation and a second composite member including a metal matrix with reinforcing fibers having a diameter and a length distributed therein in a selected orientation. The first composite member is bonded to the second composite member by a solid state bond along a predetermined joint path, such that an average volume fraction of the reinforcing fibers of the first composite member and the second composite member within the joint path is substantially the same as an average volume fraction of the reinforcing fibers of the first composite member and the second composite member within the remainder of the fiber-reinforced component.

Abstract: A fiber brush seal attached with metallic structure, suitable for use with SiC-SiC ceramic matrix composite (CMC) components. The fibers may be selected from oxides, carbides and nitrides of silicon, tungsten, chromium, iron, titanium, boron, zirconium and aluminum, and may optionally be coated with a boron nitride based coating.

Abstract: A graphite-particles-dispersed composite produced by compacting graphite particles coated with a high-thermal-conductivity metal such as silver, copper and aluminum, the graphite particles having an average particle size of 20-500 ?m, the volume ratio of the graphite particles to the metal being 60/40-95/5, and the composite having thermal conductivity of 150 W/mK or more in at least one direction.

Abstract: A metal matrix composite preform including an angled curved groove in the surface of the matrix material. A reinforcing fiber is placed within the angled curved groove and the stiffness of the fiber causes it to be pressed against an outer wall member defining the groove. The fiber is retained within the metal matrix composite preform prior to hot isostatic pressing.

Abstract: A composite article comprises a plurality of reinforcing fibers embedded in a matrix. The fibers have a fiber orientation of ±? with respect to an axis of loading, where ?=2 to 8 degrees to suppress or delay ply splitting.

Abstract: A three-dimensional, woven metal fiber preform and metal braze matrix forms a high temperature metallic structural joint. The preform is used with a braze alloy matrix to join a structural skin to a flangeless frame. This same basic joint can be used to create large complex structures with very little tooling. The three-dimensional woven metal preform is a flexible element that conforms to match the skin and flangeless frame, thereby avoiding high costs associated with precision fixturing. A high temperature braze metal is used as a matrix for the wire and to join the woven preform to the skin and the frame. The edges of the preform are tapered to a feather edge to avoid stress concentrations and stiffness mismatch.

Abstract: A method for joining two ceramic parts, or a ceramic part and a metal part, and the joint formed thereby. The method provides two or more parts, a braze consisting of a mixture of copper oxide and silver, a diffusion barrier, and then heats the braze for a time and at a temperature sufficient to form the braze into a bond holding the two or more parts together. The diffusion barrier is an oxidizable metal that forms either a homogeneous component of the braze, a heterogeneous component of the braze, a separate layer bordering the braze, or combinations thereof. The oxidizable metal is selected from the group Al, Mg, Cr, Si, Ni, Co, Mn, Ti, Zr, Hf, Pt, Pd, Au, lanthanides, and combinations thereof.

Abstract: Composite materials exhibiting very high strength properties and other characteristics are disclosed. The materials comprise one or more nanomaterials dispersed within one or more matrix materials. The nanomaterials can be in a variety of forms, such as for example, carbon nanotubes and/or nanofibers. The matrix material can be glass, fused silicas, or metal. Also disclosed are various processes and operations to readily disperse and uniformly align the nanotubes and/or nanofibers in the flowing matrix material, during production of the composite materials.

Abstract: Composite structures and a method for improving the electromagnetic characteristics of composite structures produces epoxy nanofibres during the lay-up of structural elements of carbon fibre composite laminates. The epoxy nanofibres are fabricated by electro-spinning and may be doped with carbon nanotubes or other conducting nanoparticles. The nanofibres are selectively applied to one or more carbon fibre plys in a controlled manner of distribution.

Abstract: A system for fabricating a free form structure of a composite material including carbon nanotubes. The system includes a discharge assembly and a composite formation device operatively linked with the discharge assembly. The discharge assembly dispenses a fusing agent such as for example a high energy density emission, a laser emission or a particle beam emission. The composite formation device includes a composite generator and an arranger in operative engagement with a composite generator. The composite generator engages with the fusing agent so as to create a composite nodal element. The composite nodal element includes a matrix and a multiplicity of fibers formed of carbon nanotubes dispersed throughout the matrix. The arranger positions one node relative to another to define the free form structure.

Abstract: A composite material according to the present invention includes: a fiber fabric (2) composed of certain fibers; and a matrix (3) which is so formed as to adhere to the fiber fabric (2). The fiber fabric (2) contains main constitutional fibers (21) and auxiliary fibers (22) which compensate the characteristics of the main constitutional fibers (21) when they are exposed to a high temperature atmosphere.

Abstract: To provide a carbon fiber Ti—Al composite material having hardness, heat resistance and abrasion resistance, having reduced weight, improved strength, elastic modulus and thermal conductivity and being excellent in the uniformity of the quality. A carbon fiber Ti—Al composite material which is prepared by pressure impregnating a molded product containing fine carbon fibers having a fiber diameter of from 0.5 to 500 nm and a carbon length of at most 1,000 ?m and having a hollow-structured central axis, carbon long fibers having a fiber diameter of from 5 to 15 ?m and a titanium powder or a titanium oxide powder, with aluminum or an aluminum alloy by molten metal forging.

Abstract: “Disclosed is high thermal conductivity materials used as heat dissipaters in microelectronic and optoelectronic devices and power generators. Also disclosed is development of composite materials with high thermal performance and low production costs for use in semiconductor devices as heat dissipaters and a process for producing this material. The materials have a thermal conductivity above 200 Wm?1K?1 and a coefficient of thermal expansion in the range of 2 to 10×10?6K?1 (measured in the temperature range of 20 to 300° C. in at least two directions). The composite material is constituted in three phases: a phase consisting mainly of graphite flakes; a phase comprising particles or fibers of a flake separating material, selected from a ceramic material (such as SiC, BN, AlN, TiB2 and diamond) and carbon fibers, of high thermal performance in at least one direction; and a phase consisting of a metal alloy.

Abstract: Disclosed are structural materials including polymeric reinforcement fibers that can provide added strength and fracture toughness to the matrix. The polymeric reinforcement fibers are polypropylene-based monofilament fibers or tape fibers exhibiting extremely favorable mechanical characteristics for structural reinforcement including modulus greater than 12 MPa and elongation less than about 10%. The disclosed reinforced composite materials can exhibit desired average residual strength values with less total fiber loading necessary to attain the ARS values as compared to previously known polymer reinforced materials. Very high strength and fracture toughness can be attained in the disclosed composite materials.

Abstract: Fibrous monolith processing techniques to fabricate multifunctional structures capable of performing more than one discrete function such as structures capable of bearing structural loads and mechanical stresses in service and also capable of performing at least one additional non-structural function.

Abstract: Disclosed are a nano-composite composition and a method of making such a composite that is composed of a matrix material and dispersed reinforcement nano-scaled graphene plates (NGPs) that are substantially aligned along at least one specified direction or axis. The method comprises: (a) providing a mixture of nano-scaled graphene plates (NGPs) and a matrix material in a fluent state; (b) extruding the mixture to form a filament wherein NGPs are aligned along a filament axis; (c) aligning a plurality of segments of the filament in a first direction, or moving the filament back and forth along a first direction and its opposite direction, to form a NGP-matrix filament preform; and (d) consolidating the preform to form the nanocomposite material. Also disclosed is a method of making a nano-composite fiber.

Abstract: A fibre composite material having a metal matrix includes a fibre material having individual fibres. A metal coating includes a metallization layer disposed on the individual fibres so as to surround the fibres.

Abstract: A portion of a reinforcing member has a stacked structure 102 in which plural iron plates having openings 106 are stacked. A hollow portion 107 is formed inside the stacked structure 102, so that the reinforcing member is reduced in weight. Porous bodies 103 composed of non-woven fabric of metal fibers are disposed on surfaces contacting matrixes, so that adhesion between the reinforcing member and the matrix is improved, and peeling therebetween is prevented. A cast product which is composed of light metal and has the above reinforcing member has a small thermal expansion. For example, the cast product is desirable for use for a journal portion of an engine block.

Abstract: The object is to provide a functional composite material which is adaptable to environmental changes. The present invention provides a method for producing a functional composite material comprising a step wherein an insert layer is formed on a first metal substrate having a groove; a step wherein a piezoelectric fiber having a metal core is placed on the first metal substrate; and a step wherein a second metal substrate and the first metal substrate are hot-pressed. The present invention can provide a functional composite material which is adaptable to environmental changes.

Abstract: A composite material and a base plate made of this composite material for mounting electrical components and for connecting these components to a cooling device is disclosed. In one embodiment, the composite material includes a matrix material and fibers embedded therein. The fibers have in this case an anisotropic, directionally optimized distribution in the matrix material, so that heat occurring in a locally confined area can be effectively distributed and dissipated. The material of the fibers includes SiC, highly graphitized carbon or diamond. The fibers are arranged in the matrix material in various fiber levels, the fibers in the upper fiber levels being oriented predominantly horizontally in relation to a reference area and the fibers in the lower fiber levels being oriented predominantly vertically in relation to the reference area.

Abstract: Disclosed herein is a composite film comprising a layer of an organic polymer, wherein the organic polymer is an elastomer; the organic polymer having an elastic modulus of less than or equal to about 105 Pascals when measured at room temperature; and a bundle of carbon fibers disposed in the layer of organic polymer; each bundle comprising a column and an end face; each bundle also having a longitudinal axis that is substantially parallel to the column and passes through the center of the column; the end face of the carbon fiber bundle intercalated with nitrate ions and fibrillated so as to have a surface area measured perpendicular to the longitudinal axis that is about 110% to about 250% greater than the surface area of a cross-section of the carbon fiber bundle measured at the column.

Abstract: A porous material comprising vapor grown carbon fiber in an amount of 10 to 90 mass %, fiber filaments of the carbon fiber forming a three-dimensional network and having a diameter of 1 to 1,000 nm, an aspect ratio of 5 to 15,000, a specific surface area (by BET method) of 2 to 2,000 m2/g, and the ratio of the intensity of the peak at 1,360 cm?1 in a Raman scattering spectrum of the carbon fiber to that of the peak at 1,580 cm?1 in the spectrum(I1360/I1580) is 0.1 to 2.0, wherein the porosity of the porous material (V/V0) is 0.50 to 0.99 and a specific surface area is 5 to 1,000 m2/g; and a production method and use thereof. The vapor grow carbon fiber impregnated in the porous material of the present invention does not contain aggregates and a three-dimensional network is formed between the fiber filaments, wherein length of each of the fiber filaments is maintained.

Abstract: A lightweight, high strength structure is described where a core material has a first and second metal matrix composite layer on surfaces of the core material. A sandwich type structure may be formed. The core material may be a solid material, a foam, a honeycomb structure, or may be a channeled material. The metal matrix composite layers may include fiber reinforced metal matrix composites.

Abstract: A reinforced carbon-carbon (RCC) composite material has improved impact resistance. The RCC composite material is formed from a fiber reinforcement of layers or plies of thin ply carbon fiber fabric impregnated with a carbon matrix. Carbon nanotube reinforcement in the matrix further improves impact resistance. The stacking arrangement of the plies of the thin ply fabric also further improves impact resistance.

Abstract: A carbon-containing metal matrix composite material and a method for producing the same are described, wherein the graphitized vapor grown carbon fibers (VGCF) on which a metal carbide film is formed via a sintering step, so as to improve the compounding quality and increase the content of the carbon material in the metal matrix, are dispersed uniformly in the metal matrix. The graphitized VGCF used in the present invention can be unidirectional VGCF or the VGCF having a three-dimensional linkage structure.

Abstract: The invention relates to a method that involves (a) removing graphite from at least one surface of a metal graphite composite material; (b) chemically cleaning or plasma etching the surface of the metal graphite composite material; (c) applying a metal-containing material to the surface of the chemically cleaned or plasma etched metal graphite composite material, and thereby forming an intermediate layer; (d) applying a metal coating on the intermediate layer, and thereby forming a composite material. The invention also relates to a composite material comprising (a) a metal graphite composite substrate having at least one surface that is substantially free of graphite; (b) a metal-containing intermediate layer located on a surface of the substrate; and (c) a metal coating on the intermediate layer.