Patent ID: 7837811

Claim:
A method for manufacturing a composite of a carbon nanomaterial and a metallic material, the method comprising: compositing a metallic material of non-ferrous metal alloy with a carbon nanomaterial by adding the carbon nanomaterial in a state where the metallic material shows thixotropic properties by spheroidization of solid phase in a semi-solid state thereof, the compositing being performed by: adding the carbon nanomaterial to the metallic material in the semi-solid state while stirring, shearing, and kneading the metallic material in the semi-solid state to granulate the solid phase in the semi-solid metallic material to a granular solid phase and to spheroidize the granular solid phase while maintaining the metallic material being stirred, sheared, and kneaded at a solid-liquid coexisting temperature; and dispersing uniformly the carbon nanomaterial into the liquid phase between solid phases while refining grains of the solid phases, by applying ultrasonic vibration to the metallic material in the semi-solid state after said stirring, shearing, and kneading or concurrent therewith.