Abstract: Provided are: a pitch-based carbon fiber having a defect number density of 40/m or less, a shape of a cross-section of the pitch-based carbon fiber perpendicular to a longitudinal direction being a circle or an ellipse having oblateness of 0.25 or less, and the pitch-based carbon fiber having a boundary surface in a diametrical direction of the circular cross-section or in a major axis direction of the elliptical cross-section; a method of producing the pitch-based carbon fiber; and a fiber-reinforced plastic.

Abstract: A composite of metal and carbon-fiber-reinforced plastic according to the present invention comprising a predetermined metal member, a resin layer positioned at a surface of at least part of the metal member and containing an inorganic filler having a thermal conductivity of 20 W/(m·K) or more, and carbon fiber reinforced plastic positioned on the resin layer and containing a predetermined matrix resin and carbon reinforcing fiber present in the matrix resin, the carbon reinforcing fiber being at least one of pitch-based carbon reinforcing fiber having a thermal conductivity of 180 to 900 W/(m·K) in range or PAN-based carbon reinforcing fiber having a thermal conductivity of 100 to 200 W/(m·K) in range, a content of the inorganic filler in the resin layer being 10 to 45 vol % in range with respect to a total volume of the resin layer, a number density of the inorganic filler present in a region of a width X ?m from an interface of the resin layer and the carbon fiber reinforced plastic in a direction of the r

Abstract: A composite consisting of a metal member and a vibration damping material, wherein the occurrence of poor appearance when the temperature rises is suppressed. The composite of the present disclosure includes a first metal member, a second metal member, and a vibration damping material excluding fiber-reinforced plastics. The vibration damping material is arranged in at least a part of a portion where the first metal member and the second metal member overlap and is sandwiched between the first metal member and the second metal member, and there is no bonding between at least one of the first metal member and the second metal member and the vibration damping material.

Abstract: In a metal-fiber reinforced plastic (FRP) composite, the FRP and the metal member are bonded together, so internal stress (thermal stress) is generated due to the misfit of coefficients of thermal expansion of the metal member and the FRP. Not only does the binder layer peel off and the mechanical properties of the FRP cannot be obtained, but also defects in appearance (surface strain) occur. Therefore, the technical problem is to secure the mechanical properties as a composite while easing the internal stress and keeping surface strain from being generated. The metal-fiber reinforced plastic (FRP) composite according to the present invention solves the technical problem by sandwiching an FRP between two metal members and not having at least one of the metal members joined (bonded) with the FRP. Further, it is possible to arrange an intermediate member between the other metal member and the FRP and sandwich the FRP between the two metal members through the intermediate member.

Abstract: To improve strength, rigidity, vibration damping properties and achieve a weight reduction while suppressing an increase in cost. A carbon fiber reinforced plastic composite metal plate for vehicles according to the present invention includes: a predetermined metal plate; and a mixed resin layer including: a plurality of carbon fiber reinforced plastic layers provided on at least a portion of one surface or both surfaces of the metal plate, the carbon fiber reinforced plastic layers containing a predetermined matrix resin and carbon reinforcing fibers present in the matrix resin; and a resin layer located at least between any layers of the carbon fiber reinforced plastic layers or at the interface between the carbon fiber reinforced plastic layer and the metal plate, the resin layer containing a resin having a Young's modulus of less than 1 GPa and a loss coefficient of 0.01 or more, which is different from the matrix resin.

Abstract: [Problem] A metal-fiber reinforced resin material composite is provided which improves the shear strength between a metallic member and a fiber reinforced material by more strongly bonding the metallic member and the fiber reinforced resin member, and which is very light and has excellent workability while increasing strength. [Solution] This metal-fiber reinforced resin material composite is provided with a metallic member and with a fiber reinforced resin material that is stacked on at least one surface of the metallic member and combined with the metallic member, wherein the fiber reinforced resin material comprises a matrix resin containing a thermoplastic resin, a reinforcing fiber material included in the matrix resin, and a resin layer interposed between the reinforcing fiber material and the metallic member and comprising a resin of the same type as the matrix resin. The shear strength of the metallic member and the fiber reinforced resin material is greater than or equal to 0.8 MPa.

Abstract: In a metal-fiber reinforced plastic (FRP) composite, the FRP and the metal member are bonded together, so internal stress (thermal stress) is generated due to the misfit of coefficients of thermal expansion of the metal member and the FRP. Not only does the binder layer peel off and the mechanical properties of the FRP cannot be obtained, but also defects in appearance (surface strain) occur. Therefore, the technical problem is to secure the mechanical properties as a composite while easing the internal stress and keeping surface strain from being generated. The metal-fiber reinforced plastic (FRP) composite according to the present invention solves the technical problem by sandwiching an FRP between two metal members and not having at least one of the metal members joined (bonded) with the FRP. Further, it is possible to arrange an intermediate member between the other metal member and the FRP and sandwich the FRP between the two metal members through the intermediate member.

Abstract: To provide a metal-fiber reinforced resin material (FRP) composite having a good appearance even when used as an automobile outer panel and not deformed even after a coating and baking process. The metal-FRP composite of the invention has a laminated structure of three or more layers, having at least a metal layer, a fiber-reinforced resin material layer holding a reinforced fiber material in a layer constituted by a matrix resin, and a resin layer located between the metal layer and the fiber-reinforced resin material layer. The resin layer is a layer constituted by a room temperature curing adhesive or by a predetermined resin and the room temperature curing adhesive. An elastic modulus E of the resin layer is more than 0.1 MPa and 1000 MPa or less, and a thickness of the resin layer is 0.005 times or more and less than 7.500 times a thickness of the metal layer.

Abstract: The invention has as its object the provision of a metal-fiber reinforced plastic composite able to more reliably prevent occurrence of an electrolytic corrosion action when forming a composite of a metal member and a fiber reinforced plastic layer comprising reinforcing fiber (carbon fiber) and a matrix resin. A metal-fiber reinforced plastic composite 1 according to the present invention comprises a metal member 10, an insulating layer 30 arranged on at least part of a surface of the metal member 10 and comprising a first matrix resin 31 containing nonconductive fiber 32, and a CFRP layer 40 arranged on at least part of a surface of the insulating layer 30 and comprising a second matrix resin 41 containing carbon fiber 42, wherein, when viewing the surface of the metal member 10 from vertically above, the CFRP layer 40 is positioned at the inside of a region where the insulating layer 30 is present and an outer edge of the CFRP layer 40 and an outer edge of the insulating layer 30 are 0.2 mm or more apart.

Abstract: [Problem] To provide a metal/fiber-reinforced resin material composite in which a metal member and a fiber-reinforced resin material are firmly bonded, a light weight and excellent workability are obtained while the strength is enhanced, and the amount of the fiber-reinforced resin material used can be reduced.

Abstract: A metal-fiber reinforced resin material composite is provided which improves the shear strength between a metallic member and a fiber reinforced material by more strongly bonding the metallic member and the fiber reinforced resin member, and which is very light and has excellent workability while increasing strength. [Solution] This metal-fiber reinforced resin material composite is provided with a metallic member and with a fiber reinforced resin material that is stacked on at least one surface of the metallic member and combined with the metallic member, wherein the fiber reinforced resin material comprises a matrix resin containing a thermoplastic resin, a reinforcing fiber material included in the matrix resin, and a resin layer interposed between the reinforcing fiber material and the metallic member and comprising a resin of the same type as the matrix resin. The shear strength of the metallic member and the fiber reinforced resin material is greater than or equal to 0.8 MPa.

Abstract: A composite of metal and carbon-fiber-reinforced plastic according to the present invention comprising a predetermined metal member, a resin layer positioned at a surface of at least part of the metal member and containing an inorganic filler having a thermal conductivity of 20 W/(m·K) or more, and carbon fiber reinforced plastic positioned on the resin layer and containing a predetermined matrix resin and carbon reinforcing fiber present in the matrix resin, the carbon reinforcing fiber being at least one of pitch-based carbon reinforcing fiber having a thermal conductivity of 180 to 900 W/(m·K) in range or PAN-based carbon reinforcing fiber having a thermal conductivity of 100 to 200 W/(m·K) in range, a content of the inorganic filler in the resin layer being 10 to 45 vol % in range with respect to a total volume of the resin layer, a number density of the inorganic filler present in a region of a width X ?m from an interface of the resin layer and the carbon fiber reinforced plastic in a direction of the r

Abstract: A carbon material for catalyst carrier use excellent in both durability and power generation performance under operating conditions at the time of low humidity, in particular both durability of a carbon material for catalyst carrier use with respect to repeated load fluctuations due to startup and shutdown and power generation performance under operating conditions at the time of low humidity, and a catalyst for solid-polymer fuel cell use prepared using the same etc. are provided. To solve this technical problem, according to one aspect of the present invention, there is provided a carbon material for catalyst carrier use satisfying the following (A) to (D): (A) an oxygen content OICP of 0.1 to 3.0 mass % contained in the carbon material for catalyst carrier use; (B) a residual amount of oxygen O1200° C. of 0.1 to 1.5 mass % remaining after heat treatment in an inert gas (or vacuum) atmosphere at 1200° C.

Abstract: [Problem] To bond a metal member and a fiber-reinforced resin material, which uses a thermoplastic phenoxy resin as a matrix resin, with each other without decreasing the performance of the fiber-reinforced resin material; and to suppress the occurrence of electrolytic corrosion between the metal member and the fiber-reinforced resin material. [Solution] A metal-fiber reinforced resin material composite body according to the present invention is provided with: a metal member; a fiber-reinforced resin material which is superposed on at least one surface of the metal member so as to be complexed with the metal member; and a bonding resin layer which is interposed between the metal member and the fiber-reinforced resin material.

Abstract: [Problem] To provide a metal/fiber-reinforced resin material composite in which a metal member and a fiber-reinforced resin material are firmly bonded, a light weight and excellent workability are obtained while the strength is enhanced, and the amount of the fiber-reinforced resin material used can be reduced.

Abstract: The present invention provides a novel and improved metal-air battery in which a lot of catalyst can be disposed in a triple phase boundary, and further, battery properties can be improved. In the metal-air battery according to the present invention, a catalyst layer of an air electrode of a metal-air battery contains a catalyst element and a carbon material, the carbon material comprises two materials of a carbon material A supporting thereon the catalyst element and a carbon material B not supporting the catalyst element, the catalyst layer comprises an agglomerate X containing the catalyst element, the carbon material A and the carbon material B as main components and an agglomerate Y containing the carbon material B as a main component, and the agglomerate X is a continuum and the agglomerate Y is dispersed in the agglomerate X.

Abstract: Disclosed is an R-T-B—Ga-based magnet material ahoy where R is at least one element selected from rare earth metals including Y and excluding Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and T is one or more transition metals with Fe being an essential element. The R-T-B—Ga-based magnet material alloy includes: an R2T14B phase 3 which is a principal phase, and an R-rich phase (1 and 2) which is a phase enriched with the R, wherein a non-crystalline phase 1 in the R-rich phase has a Ga content (mass %) that is higher than a Ga content (mass %) of a crystalline phase 2 in the R-rich phase. With this, it is possible to enhance the magnetic properties of rare earth magnets that are manufactured from the alloy and reduce variations in the magnetic properties thereof.

Abstract: Provided is a negative electrode active material that can improve the capacity per volume and charge-discharge cycle characteristics of a nonaqueous electrolyte secondary battery represented by a lithium ion secondary battery. The negative electrode active material according to the present embodiment contains an alloy phase. The alloy phase undergoes thermoelastic diffusionless transformation when releasing or occluding metal ions. The negative electrode active material of the present embodiment is used in a nonaqueous electrolyte secondary battery. Thermoelastic diffusionless transformation refers to so-called thermoelastic martensitic transformation.

Abstract: Provided is a composite particle which can improve the capacity per volume and charge-discharge cycle characteristics. The composite particle includes a plurality of specific particles and a binding material. The specific particle contains an alloy phase. The alloy phase undergoes thermoelastic diffusionless transformation when releasing metal ions or occluding metal ions. The binding material contains at least one of non-graphite carbon and a carbon precursor. The plurality of specific particles bind with each other via the binding material.

Abstract: Provided is a negative electrode active material that can improve the discharge capacity per volume and charge-discharge cycle characteristics. The negative electrode active material according to the present embodiment contains an alloy phase. The alloy phase undergoes thermoelastic diffusionless transformation when releasing metal ions or occluding metal ions. The oxygen content of the negative electrode active material is not more than 5000 ppm in mass.