Yazaki Corporation

The University of Tokyo

Jun Yanagimoto

Kenichi Hanazaki

Hideo Gonda

Junichiro Tokutomi

Junichirou Tokutomi

Ken Nishiura

Junichiro Shiomi

Youhei Uchida

Sumio Sugiyama

An electrical wire includes an aluminum element wire that has an aluminum base material and carbon nanotubes dispersed in the aluminum base material, in which the aluminum element wire has an electrical conductivity of 62% IACS or more and a tensile strength of 130 MPa or more. The aluminum base material is a polycrystal having a plurality of aluminum crystal grains. Further, a carbon nanotube conductive path, which is composed of the carbon nanotube, and forms a conductive path allowing electricity to conduct therethrough in a longitudinal direction of the aluminum element wire by being present in a part of grain boundaries between the plurality of aluminum crystal grains in a transverse cross section of the aluminum base material, and being present along the longitudinal direction of the aluminum element wire, is formed in the aluminum base material.

Electrical wire and wire harness using the same

A carbon nanotube composite material () includes a metal base material () and carbon nanotube electrically-conductive path portions (). The metal base material () is made from a polycrystalline substance in which a plurality of rod-shaped metal crystal grains () are oriented in a direction. The carbon nanotube electrically-conductive path portions () are made from doped carbon nanotubes having a dopant, existing in parts of grain boundaries () between the rod-shaped metal crystal grains () in a cross section of the metal base material (), and forming an electrically-conductive path which is electrically conductive in a longitudinal direction of the metal base material (), by existing along the longitudinal direction (L).

Carbon nanotube composite material

A carbon nanotube composite material includes a metallic base composed of a polycrystalline substance in which a plurality of rod-shaped metallic crystal grains are oriented in a same direction and a carbon nanotube conductive path, which is composed of a carbon nanotube, and forms a conductive path allowing electricity to conduct therethrough in a longitudinal direction of the metallic base by being present in a part of grain boundaries between the rod-shaped metallic crystal grains on a transverse plane of the metallic base, and being present along the longitudinal direction of the metallic base.

Carbon nanotube composite material and process for producing same

To provide a metal wire and an electric wire of high mechanical strength and high ductibility that have sufficiently increased ductibility as well as sufficiently increased mechanical strength. A metal wire manufactured at least by being subjected to an extension in which a metal wire is extended in an axial direction, and having a hardness distribution in which hardness decreases toward a specific peripheral portion from a central portion in a cross-section orthogonal to axis, whereby a softened peripheral portion becomes to show a good malleability as well as a high resistance to cracking, so as to attain an improvement of mechanical strength and ductibility.

Growing community of inventors

Tokyo, Japan

Jun Yanagimoto