▎ 摘　　要

NOVELTY - A graphene/metal nanocomposite powder comprises a base metal; and graphenes dispersed in the base metal and acting as a reinforcing material for the base metal, where the graphenes are interposed as thin film types between metal particles of the base metal and bonded to the metal particles, and the graphenes contained in the base metal have a volume fraction exceeding 0 vol.% and less than 30 vol.% corresponding to a limit within which a structural change of the graphenes due to a reaction between the graphenes is prevented. USE - As graphene/metal nanocomposite powder in graphene/metal nanocomposite material serving as a powdered sintering material (claimed); as high temperature structure materials, tool materials, electromagnetic materials and materials for filters and sensors; and in a wide range of industrial fields. ADVANTAGE - The powder exhibits enhanced mechanical and electrical characteristics. The powder allows formation of high-value added component materials such as highly conductive, highly elastic wire coating materials and wear-resistant coating materials. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a graphene/metal nanocomposite material serving as a powdered sintering material comprising the graphene/metal nanocomposite powder; (2) a method (M1) of manufacturing graphene/metal nanocomposite powder involving: (a) dispersing a graphene oxide in a solvent; (b) providing a salt of a metal as a base metal to the solvent in which the graphene oxide is dispersed; and (c) forming powder in which graphenes are dispersed as thin film types between metal particles of the base metal by reducing the graphene oxide and the salt of the metal, where the dispersed graphenes act as a reinforcing material for the base metal and are controlled to have a volume fraction exceeding 0 vol.% and less than 30 vol.% corresponding to a limit within which a structural change of the graphenes due to a reaction between the graphenes is prevented; (3) a method (M2) of manufacturing a metal nanocomposite material involving forming a bulk material by sintering the graphene/metal nanocomposite powder manufactured by method (M1) under a high pressure at a temperature of 50 to 80% of a melting point of a base metal; (4) a method (M3) of manufacturing metal nanocomposite powder involving: (a1) dispersing a graphene oxide in a solvent; (b1) providing a salt of a metal as a base metal to the solvent in which the graphene oxide is dispersed; (c1) forming a metal oxide by oxidizing the salt of the metal contained in the solvent; and (d1) forming powder in which graphenes are dispersed as thin film types between metal particles of the base metal by reducing the graphene oxide and the metal oxide, where the dispersed graphenes act as a reinforcing material for the base metal and are controlled to have a volume fraction exceeding 0 vol.% and less than 30 vol.% corresponding to a limit within which a structural change of the graphenes due to a reaction between the graphenes is prevented; and (5) a method of manufacturing a graphene/metal nanocomposite material involving forming a bulk material by sintering the graphene/metal nanocomposite powder prepared using the method (M3) at a temperature of 50% to 80% of a melting point of the base metal.