Patent ID: 9362022
Filing Date: 2016-06-07
CPC Classification: B21C,B22F,C22C,C22F,H01B

Claim Text:
1. A composite electric cable comprising: a plurality of element wires twisted together, wherein the element wires include a carbon-nanotube-containing aluminum element wire which is a material wire formed of a composite material comprising an aluminum material and carbon nanotubes dispersed in the aluminum material; the carbon-nanotube-containing aluminum element wire has a cellulation structure including a wall portion containing the carbon nanotubes and an inside portion of the wall which is surrounded by the wall portion and which comprises the aluminum material and unavoidable impurities; the carbon-nanotube-containing aluminum element wire has a ratio of carbon nanotube content to aluminum material content of 0.2 wt. % to 5 wt. %; the carbon-nanotube-containing aluminum element wire has a tensile strength of 150 MPa or higher and a linear expansion coefficient of 10×10 each of all the element wires forming the composite electric cable is the carbon-nanotube-containing aluminum element wire, or the composite electric cable includes in a center portion thereof one or a plurality of steel wires.