Abstract: A fiber-reinforced resin material used for molding a fiber-reinforced resin which includes a matrix resin and reinforcing fiber bundles A including chopped fiber bundles each including 100 or more single fibers, wherein the product of an average porosity within fiber bundles Pfav (?) and an average fiber bundle thickness tfav (mm) is 0 mm or more and 0.01 mm or less and a porosity of composite Pc (?) is 0.02 or more and 0.4 or less, and a method for producing the same. The fiber-reinforced resin material is a molding material excellent in terms of productivity and reduction in LCA, which can give high mechanical properties to a molded article using the molding material and further which is excellent also in flowability during molding.

Abstract: The present invention provides a prepreg that has high impact resistance despite being an all-carbon-fiber FRP (CFRP), the prepreg moreover enabling a molding time to be set to five minutes or less and making it possible to reduce molding costs. This prepreg is obtained by impregnating carbon fiber with a matrix resin comprising a mixture of a thermoplastic resin, a thermosetting resin, and a curing agent, wherein: the thermoplastic resin is a phenoxy resin; the thermosetting resin is a urethane acrylate resin; the thermoplastic resin and the thermosetting resin are compounded in a mass ratio of 15:85-35:65 (thermoplastic resin/thermosetting resin); and the curing agent causes cross-linking to occur due to a radical polymerization reaction, and is formed so as to include first and second peroxides having mutually different initiation temperatures, initiation of the second peroxide starting at a temperature at which termination of the first peroxide occurs.

Abstract: The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FACW). In one embodiment, a tubular welding wire includes a sheath and a core, and the core comprises a rare earth silicide component (cerium, lanthanum, or a combination thereof). The core may also comprise an organic stabilizer component, a carbon component, and an agglomerate. The organic stabilizer component may comprise an organic molecule or organic polymer bound to one or more Group I or Group II metals. The carbon component may comprise graphite, graphene, carbon black, lamp black, carbon nanotubes, diamond, or a combination thereof. The agglomerate may comprise oxides of one or more Group I or Group II metals, titanium, and manganese.

Abstract: By sequentially performing: a step (I) of dissolving fullerene C60 in a polyalkylene glycol to prepare a fullerene solution; a step (II) of immersing a material carbon fiber in the fullerene solution; and a step (III) of extracting the carbon fiber from the fullerene solution, washing the extracted carbon fiber with water, and drying the carbon fiber washed with water, a carbon fiber on which fullerene C60 adsorbs is obtained.

Abstract: A method for fabricating an electrical conductor on a substrate by cold spraying includes propelling a solid powder composition that includes copper and highly oriented pyrolytic graphite using a gas propellant, and directing the solid powder composition towards the substrate at a velocity sufficient to cause the solid powder composition to undergo plastic deformation and to adhere to the substrate to deposit the electrical conductor thereon.

Abstract: A foldable transparent electrode based on fiber and a manufacturing method thereof are provided. The manufacturing method of a foldable transparent electrode based on fiber according to the exemplary embodiment includes: coating a nylon-6 nanofiber nonwoven fabric with a polymer to prepare a nylon-6 nanofiber transparent thin film, and spin coating the nylon-6 nanofiber transparent thin film with a silver nanowire solution.

Abstract: A method of forming a moisture-tolerant coating on a silicon carbide fiber includes exposing a silicon carbide fiber to a gaseous N precursor comprising nitrogen at an elevated temperature, thereby introducing nitrogen into a surface region of the silicon carbide fiber, and exposing the silicon carbide fiber to a gaseous B precursor comprising boron at an elevated temperature, thereby introducing boron into the surface region of the silicon carbide fiber. Silicon-doped boron nitride is formed at the surface region of the silicon carbide fiber without exposing the silicon carbide fiber to a gaseous Si precursor comprising Si. Thus, a moisture-tolerant coating comprising the silicon-doped boron nitride is grown in-situ on the silicon carbide fiber.

Abstract: To provide a process for producing a ceramic fiber-reinforced composite material, which suppresses the deterioration of an interface layer, improves mechanistic properties and has excellent durability even under a high temperature, even ceramic fibers formed of silicon carbide fibers are used, without complicating the production steps. To obtain a ceramic fiber-reinforced composite material, by melt-infiltrating a composite material substrate obtained by forming ceramic fibers, formed of silicon carbide fibers and having an amorphous structure, into a composite with a matrix formed of an inorganic substance, with an alloy having a composition that is constituted by a disilicide of at least one or more transition metal among transition metals selected from scandium, yttrium, titanium, zirconium, hafnium, and tantalum, and silicon as the remainder, and having the silicon content ratio of 66.7 at % or more and less than 90.0 at %.

Abstract: To provide an aluminum-silicon carbide composite which is suitable for use as a power-module base plate. An aluminum-silicon carbide composite wherein a peripheral portion having, as a main component thereof, an aluminum-ceramic fiber composite containing ceramic fibers having an average fiber diameter of at most 20 ?m and an average aspect ratio of at least 100, is provided on the periphery of a flat plate-shaped aluminum-silicon carbide composite having a plate thickness of 2 to 6 mm formed by impregnating, with a metal containing aluminum, a porous silicon carbide molded body having a silicon carbide content of 50 to 80 vol %, and wherein the proportion of the aluminum-ceramic fiber composite occupied in the peripheral portion is at least 50 area %.

Abstract: A graphene fiber and a preparation method thereof, where the graphene fiber is a composite fiber of metal nanowire doped graphene fiber, and principal components of the composite fiber are graphene and metal nanowires, a mass ratio of metal nanowires is 0.1%-50%, the graphene is in a form of sheet, and both the metal nanowires and graphene sheets are arranged in parallel along an axial direction of the graphene fiber. The metal nanowire doped graphene fiber is a new type of a high performance multi-functional fiber material, which achieves a significant improvement in electrical conductivity of graphene fibers through doping of metal nanowires and meanwhile demonstrates excellent tensile strength and toughness. The metal nanowire doped graphene fiber has great potential application value in a plurality of fields, for example, it is used as a lightweight flexible wire.

Abstract: A composite production method includes impregnating a plate-shaped porous inorganic structure and a fibrous inorganic material with a metal while the fibrous inorganic material is arranged to be adjacent to the porous inorganic structure. In the composite structure, first and second phases are adjacent to each other by using a porous inorganic structure having a porous silicon carbide ceramic sintered body and the fibrous inorganic material, the first phase being a phase in which the porous silicon carbide ceramic sintered body is impregnated with the metal, the second phase being a phase in which the fibrous inorganic material is impregnated with the metal, a percentage of the porous silicon carbide ceramic sintered body in the first phase is 50 to 80 volume percent, and a percentage of the fibrous inorganic material in the second phase is 3 to 20 volume percent. A composite is produced by the method.

Abstract: Adhesive compositions that contain thermally conductive carbon-based materials that are also electrically insulated; methods for using such adhesive compositions and methods for their preparation.

Abstract: A medical device lead includes a thin profile conductor assembly. A proximal connector includes a proximal end that is configured to couple the lead to a pulse generator. An insulative lead body extends distally from the proximal connector. The conductor assembly extends distally from the proximal end within the lead body and includes a non-conductive tubular core member that defines a lumen, an outer insulative layer, and a multilayer conductor between the tubular core member and the outer insulative layer. The multilayer conductor is electrically connected to the proximal connector and includes a first conductive layer adjacent to the tubular core member and a second conductive layer adjacent to the first conductive layer opposite the tubular core member. A conductivity of the second conductive layer is greater than a conductivity of the first conductive layer.

Abstract: The present invention relates to a surface modified overhead conductor with a coating that allows the conductor to operate at lower temperatures. The coating contains about 5% to about 30% of an inorganic adhesive, about 45% to about 92% of a filler, about 2% to about 20% of one or more emissivity agents, and about 1% to about 5% of a stabilizer.

Abstract: A composition includes a carbon nanotube (CNT) yarn or sheet and a plurality of carbon nanostructures (CNSs) infused to a surface of the CNT yarn or sheet, wherein the CNSs are disposed substantially radially from the surface of the CNT yarn or outwardly from the sheet. Such compositions can be used in various combinations in composite articles.

Abstract: A composite including: silicon (Si); a silicon oxide of the formula SiOx, wherein 0<x<2; and a graphene disposed on the silicon oxide.

Abstract: A carbon fiber bundle has carbon fibers and a sizing agent, wherein the sizing agent comprises a water soluble polyurethane resin having an SP value of 11.2 to 13.3, and the sizing agent is deposited on the carbon fibers at a rate of 0.5 to 7% by mass. In another carbon fiber bundle, the sizing agent is composed of the component shown in (A) and the component shown in (B1) or (B2) below, and the sizing agent is deposited on the carbon fibers at a rate of 0.5 to 7% by mass: (A) 73 to 98% by mass of a polyoxyalkylene unit; (B1) 0.5 to 15% by mass of an aromatic ester unit, 1.5 to 10% by mass of an aromatic urethane unit; and (B2) 0.5 to 10% by mass of an aromatic ester unit, 1.5 to 11% by mass of an aliphatic urethane unit.

Abstract: The present invention relates to a method for enhancing the adhesion of CNTs to the surface of a material, including the following steps carried out under an inert gas current or currents optionally mixed with hydrogen: (i) heating the material including CNTs on the surface thereof in a reaction chamber, to a temperature of between 500° and 1,100° C.; (ii) introducing into said chamber a carbon source consisting of acetylene and/or xylene, in the absence of a catalyst; (iii) exposing the heated material to the carbon source for a period of time sufficient to ensure the production of a carbon layer of controlled thickness on the surface of said material and said CNTs covering same, as shown in the figure below; and (iv) optionally recovering the material thus covered after cooling, upon completion of step (iii). The invention likewise relates to hybrid carbon-coated reinforcements and to the uses thereof for preparing structural and functional composite materials or for preparing paints or varnishes and wires.

Abstract: A composition includes a carbon nanotube (CNT)-infused carbon fiber material that includes a carbon fiber material of spoolable dimensions and carbon nanotubes (CNTs) infused to the carbon fiber material. The infused CNTs are uniform in length and uniform in distribution. The CNT infused carbon fiber material also includes a barrier coating conformally disposed about the carbon fiber material, while the CNTs are substantially free of the barrier coating. A continuous CNT infusion process includes: (a) functionalizing a carbon fiber material; (b) disposing a barrier coating on the functionalized carbon fiber material (c) disposing a carbon nanotube (CNT)-forming catalyst on the functionalized carbon fiber material; and (d) synthesizing carbon nanotubes, thereby forming a carbon nanotube-infused carbon fiber material.

Abstract: A composition includes a carbon nanotube (CNT)-infused metal fiber material which includes a metal fiber material of spoolable dimensions, a barrier coating conformally disposed about the metal fiber material, and carbon nanotubes (CNTs) infused to the metal fiber material. A continuous CNT infusion process includes: (a) disposing a barrier coating and a carbon nanotube (CNT)-forming catalyst on a surface of a metal fiber material of spoolable dimensions; and (b) synthesizing carbon nanotubes on the metal fiber material, thereby forming a carbon nanotube-infused metal fiber material.

Abstract: Methods of producing silicon carbide fibers. The method comprises reacting a continuous carbon fiber material and a silicon-containing gas in a reaction chamber at a temperature ranging from approximately 1500° C. to approximately 2000° C. A partial pressure of oxygen in the reaction chamber is maintained at less than approximately 1.01×102 Pascal to produce continuous alpha silicon carbide fibers. Continuous alpha silicon carbide fibers and articles formed from the continuous alpha silicon carbide fibers are also disclosed.

Abstract: Three-dimensional (3D) graphene nanoribbons and methods for fabricating 3D graphene nanoribbons that may readily function as solenoid windings and the like. In one embodiment, a method of fabricating a 3D graphene nanoribbon (100) may include coating a side surface (102A) of a 3D insert (102) with a metal (104) appropriate for graphene growth thereon. The method may also include growing a layer (106) of graphene directly on the metal coating. The method may also include removing a strip of the graphene layer and metal coating (106/104) to expose the side surface (102A) of the insert (102) while leaving a line (108) of graphene on metal winding around the insert (102) and extending continuously from a first end (108A) of the line (108) to a second end (108B) of the line (108).

Abstract: This invention relates to a composite comprising carbon nanotubes coated with a polymer, wherein the polymer comprises at least one hydrophobic monomer unit. This invention also relates to a process for the production of a composite comprising a polymer and carbon nanotubes.

Abstract: A composite electrostatic rod may include a body comprising a length L and cross sectional area A. The body may include an outer portion comprising a first material, and a core comprising a second material different than the first material and surrounded by the outer portion, wherein a natural frequency of the composite electrostatic rod is greater than that of a graphite rod having the length L and cross sectional area A.

Abstract: The present invention relates to a process for synthesizing carbon nanotubes by continuous chemical vapour deposition at the surface of reinforcements, said reinforcements constituting a mixture A (i) of particles and/or fibres of a material comprising at least one oxygen atom and (ii) of particles and/or fibres of a material chosen from carbides and/or of a material comprising at least one silicon atom, said process comprising the following steps, carried out under a stream of inert gas(es) optionally as a mixture with hydrogen: (i) heating of said mixture of reinforcements A in a reaction chamber at a temperature ranging from 400° C. to 900° C.

Abstract: A flat wire is composed of a multiplicity of carbon fibers impregnated with a thermosetting resin. The flat wire, the cross section of which is rectangular, has an inner surface facing inward at all times, an outer surface facing outward at all times, and has been shaped into helical form of constant diameter in the longitudinal direction. Carbon fibers constituting the flat wire are of gradually increasing length from the inner surface toward the outer surface of the wire.

Abstract: A method of treating silicon carbide fibers comprises phosphating heat treatment in a reactive gas so as to form a coating around each fiber for protection against oxidation. The coating comprises a surface layer of silicon pyrophosphate crystals and at least one underlying bilayer system comprising a layer of a phosphosilicate glass and a layer of microporous carbon.

Abstract: Conductive polymer fibers 10, in which a conductor 12 containing a conductive polymer impregnates and/or adheres to base fibers 11, and the aforementioned conductive polymer is PEDOT-PSS.

Abstract: A fiber structure for forming a rope structure has a base matrix of base fiber material and at least one lubricity portion of lubricity material. The lubricity material determines a lubricity of at least a portion of a surface of the fiber structure.

Abstract: Ceramic matrix composites include a fiber network and a matrix including layers of first and second materials. The first material may include SiC. The second material may include an element that when oxidized forms a silicate that is stable at high temperatures.

Abstract: A fractal microstructure which includes multi-walled carbon nanotubes suited for customizable volumetric energy and power densities. Electrode monoliths can be formed from a variety of process steps including some or all of RF polymerization, RF coalescence and ripening at intersections, and multi-walled carbon nanotube crosslinking. The resulting nanocomposite is capable of performing all five functions of an electrode while at the same time offering robust mechanical strength and significantly improved energy storage capabilities through, among other things, intra- and inter-particle interlocking.

Abstract: Nanoparticles can include a core linked to a polymerizable moiety that can be polymerized, cross-linked or cured. The polymerizable nanoparticles can be included in a composition for a polymerization, cross-linking or curing reaction in an amount and disposition sufficient for inhibiting or preventing volume shrinkage during polymerization, cross-linking or curing reaction. Also, the nanoparticles can be included with monomers, dendrimers, oligomers or polymers in the compositions that can be reacted to form a polymerized, cross-linked or cured product.

Abstract: A composite material includes: carbon fibers having an average fiber length of more than about 10 mm and about 100 mm or less; and a thermoplastic resin. The carbon fibers are substantially two-dimensionally-randomly oriented. The composite material includes a carbon fiber bundle (A) in a ratio of more than 0 volume % and less than about 30 volume % to a total volume of the carbon fibers, the carbon fiber bundle (A) including the carbon fibers of a critical single fiber number defined by formula (1) or more. An average number (N) of the carbon fibers in the carbon fiber bundle (A) satisfies formula (2). Critical single fiber number=600/D??(1) 1.0×104/D2<N<2.5×104/D2??(2) D is an average fiber diameter (?m) of the carbon fibers.

Abstract: An electric arc welding wire having an outer cylindrical surface and an electrically conductive layer on the surface wherein the layer comprises an alloy of copper with the copper content being about 60% to about 90% by weight of said alloy. Furthermore, the layer can be made thin with a thickness of less than about 0.50 microns while using essentially pure copper.

Abstract: The invention relates to a crosslinkable semiconductive polymer composition comprising (a) a polyolefin, carbon black and a compound (b), to a cable, preferably to a crosslinkable comprising the polymer composition, to a production thereof, and preferably to a crosslinked cable comprising the polymer composition of the invention.

Abstract: A tape that can be used to detect cracks in a structure to which it is attached is disclosed herein. The tape includes a plurality of structural fibers. The tape also includes an electrically-insulating binder at least partially encapsulating the plurality of structural fibers. The tape also includes quantities of electrically conductive particles, each quantity of electrically conductive particles connected with one of the plurality of structural fibers.

Abstract: The invention relates to a process for preparing a composition comprising 10 to 45% of the total solids weight lignin, polyacrylonitrile or a polyacrylonitrile copolymer, and a solvent to form a lignin-based polyacrylonitrile-containing dope and the resulting products. The dope can be processed to produce fibers, including precursor, oxidized and carbonized fibers. The oxidized fibers are of value for their flame resistant properties and carbonized fibers are suitable for use in applications requiring high strength fibers, or to be used to form composite materials.

Abstract: A wire having a surface and diamond particles bonded to said surface by a bond matrix, wherein each diamond particle has surface roughness of about 0.60 to about 0.80 and a sphericity of about 0.25 to about 0.50.

Abstract: A unitary graphene matrix composite comprising: (a) a unitary graphene matrix containing an oxygen content of 0.001% to 10% by weight, obtained from heat-treating a graphene oxide gel at a temperature higher than 100° C. and contains no discrete graphene platelets derived from the graphene oxide gel; (b) a carbon or graphite filler phase selected from carbon or graphite fiber, carbon or graphite nano-fiber, carbon nano-tube, carbon nano-rod, meso-phase carbon particle, meso-carbon micro-bead, exfoliated graphite flake with a thickness greater than 100 nm, exfoliated graphite or graphite worm, coke particle, needle coke, carbon black or acetylene black particle, activated carbon particle, or a combination thereof. The carbon or graphite filler phase is preferably in a particulate, filamentary, or rod-like form dispersed in and bonded by the unitary graphene matrix.

Abstract: A fixing heater is provided that employs, as a heating element, a material having small heat capacity and excellent wear resistance. A metal or semi-metal compound that can act as an electrical conduction inhibiting material is mixed into a carbon-containing resin such as a furan resin, chlorinated vinyl chloride resin, etc., and a pattern of a heating element is formed on a substrate, by screen printing, and then is sintered at temperature of about 1000° C. to obtain a fixing heater including amorphous carbon and having NTC characteristics.

Abstract: Heterogeneous nanowires having a core-shell structure consisting of single-crystal apatite as the core and graphitic layers as the shell and a synthesis method thereof are provided. More specifically, provided is a method capable of producing large amounts of heterogeneous nanowires, composed of graphitic shells and apatite cores, in a reproducible manner, by preparing a substrate including an element corresponding to X of X5(YO4)3Z is a chemical formula for apatite, adding to the substrate a gaseous source containing an element corresponding to Y of the chemical formula, adding thereto a gaseous carbon source, and allowing these reactants to react under optimized synthesis conditions using chemical vapor deposition (CVD), and to a method capable of freely controlling the structure and size of the heterogeneous nanowires and also to heterogeneous nanowires synthesized thereby.

Abstract: A nanocomposite article that includes a single-crystal or single-crystal-like substrate and heteroepitaxial, phase-separated layer supported by a surface of the substrate and a method of making the same are described. The heteroepitaxial layer can include a continuous, non-magnetic, crystalline, matrix phase, and an ordered, magnetic magnetic phase disposed within the matrix phase. The ordered magnetic phase can include a plurality of self-assembled crystalline nanostructures of a magnetic material. The phase-separated layer and the single crystal substrate can be separated by a buffer layer. An electronic storage device that includes a read-write head and a nanocomposite article with a data storage density of 0.75 Tb/in2 is also described.

Abstract: The present invention refers to a method for the preparation of a reinforced thermoset polymer composite, said thermoset polymer composite comprising coated fibres, the coating being used as a vehicle for the introduction of carbon nanotubes into the thermoset polymer, the preparation of said reinforced thermoset polymer composite comprising the following steps: providing fibres; preparing a coating comprising carbon nanotubes and a polymeric binder; applying said coating to said fibres to obtain coated fibres; impregnating said coated fibres with a precursor of a thermoset polymer and letting part of the carbon nanotubes transfer from the coating into the precursor of the thermoset polymer; curing said precursor containing the coated fibres and the transferred carbon nanotubes to achieve the reinforced thermoset polymer composite.

Abstract: A representative embodiment includes a graphene-based fiber comprising: a starting strand; and a plurality of coatings of aligned graphene comprising: a first coating of aligned graphene axially offset at a first angle from an axis of the starting strand; a second coating of aligned graphene over the first coating and axially offset at a second angle from the axis of the starting strand; and at least one next coating of aligned graphene over a preceding coating and axially offset at a next angle from the axis of the starting strand. Another embodiment includes a plurality of intertwined and twisted graphene-based fibers. In various embodiments, the graphene may be graphene ribbons or carbon nanotubes or both. The graphene ribbon includes a plurality of aligned and overlapping graphene flakes in a polymer. Methods of fabrication are also disclosed.

Abstract: A high temperature, high voltage cable having at least one multi-strand conductor whose resistance is controlled by tightness or looseness of pitch. Also, a high temperature, high voltage cable having at least one layer of ceramifiable polymer, and at least one layer of mica/glass. Also, a high temperature, high voltage cable including at least one layer of non-conductive inorganic material, and at least one layer of mica/glass tape. Also, a high temperature, high voltage sleeve having at least one layer of ceramifiable polymer and at least one layer of mica/glass. Also, a high temperature, high voltage sleeve including at least one layer of non-conductive inorganic material and at least one layer of mica/glass. Also a heating cable having at least one layer of mica/glass and at least one layer of thermally conductive and electrically insulating inorganic materials.

Abstract: A halogen free flame-retardant polymer composition includes flame retardancy and excellent oil resistance/fuel resistance, low-temperature characteristics, and injury resistance, and an insulated electric wire and a cable include the composition. The halogen-free flame-retardant polymer composition includes a base polymer including 60 to 70% by mass of LLDPE, 10% by mass or more of EVA having a melt flow rate (MFR) of 100 or more, and 10 to 20% by mass of maleic acid-modified polyolefin, a metal hydroxide added at a ratio of 150 to 220 parts by mass relative to 100 parts by mass of the base polymer, and carbon black. The addition ratio (metal hydroxide/carbon black) between the metal hydroxide and the carbon black is 15:1 to 100:1.

Abstract: The present invention provides a method of making a carbon nanotubes fiber by providing a polyethylene terephthalate substrate; contacting the polyethylene terephthalate substrate with a polyvinyl alcohol polymer solution to form a polyvinyl alcohol polymer layer on the polyethylene terephthalate substrate; contacting the polyvinyl alcohol polymer layer with a carbon nanotube solution, wherein the carbon nanotubes solution comprises one or more carbon nanotubes; forming a nanotube layer on the polyvinyl alcohol polymer layer; delaminating the polyvinyl alcohol polymer layer from the polyethylene terephthalate substrate to release a composite fiber layer; stretching the composite fiber layer; and drying the composite fiber layer.

Abstract: Methods of oxidizing multiwalled carbon nanotubes are provided. The multiwalled carbon nanotubes are oxidized by contacting the carbon nanotubes with gas-phase oxidizing agents such as CO2, O2, steam, N2O, NO, NO2, O3, and ClO2. Near critical and supercritical water can also be used as oxidizing agents. The multiwalled carbon nanotubes oxidized according to methods of the invention can be used to prepare rigid porous structures which can be utilized to form electrodes for fabrication of improved electrochemical capacitors.

Abstract: A transparent electrode and method for manufacturing the same are disclosed. The major integrants of the transparent electrode comprise a graphene and a nanofiber. The nanofiber exhibits a light-permeable network structure to increase the light transmittance of the transparent electrode. The graphene is absorbed on the surface of the nanofiber to form a conductive light-permeable network structure. And the unique properties of the graphene lead an improvement of the mechanical strength property of the transparent electrode.

Abstract: A flash fire and chemical barrier composite fabric, comprising a flame resistant fibrous basic layer; a radiant heat and chemical permeation barrier, the barrier including a metalized polymeric chemical permeation resistant layer film; and a clear heat sealable outer film layer overlying the radiant barrier and forming a heat sealable outer surface of the composite fabric.