公开(公告)号：US20240117483A1

公开(公告)日：2024-04-11

申请号：US18275775

申请日：2022-02-28

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Akihiro KIKUCHI ,  Hitoshi KITAGUCHI ,  Yasuo IIJIMA ,  Kazuto HIRATA

IPC: C23C14/16 ,  C23C14/02 ,  C23C14/32 ,  C23C14/58

CPC classification number: C23C14/16 ,  C23C14/022 ,  C23C14/32 ,  C23C14/5806 ,  C23C14/5886

Abstract: The problem addressed by the present invention is to provide a copper-coated aluminum wire material with a reduced weight and excellent adhesiveness, and a production method therefor.
This copper-coated aluminum wire material is provided with an aluminum wire material comprising aluminum or an aluminum alloy and a thin copper film covering the aluminum wire material. The space factor of the thin copper film is in the range of 0.2% to 4% and the adhesiveness between the aluminum wire material and the thin copper film based on a scratch test compliant with JIS R 3255 is at least 10 mN.

公开(公告)号：US20240428965A1

公开(公告)日：2024-12-26

申请号：US18710851

申请日：2022-09-06

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE ,  Japan Superconductivity Application Development Inc.

Inventor： Akihiro KIKUCHI ,  Yasuo IIJIMA ,  Masaru YAMAMOTO ,  Masatoshi KAWANO ,  Masato OTSUBO

IPC: H01B12/08 ,  H01F6/06

Abstract: The purpose of the present invention is to provide a niobium-aluminum precursor wire having properties such as expression of flexibility and ensuring a large single-wire length, as well as a twisted wire, a superconducting wire, and a superconducting twisted wire formed of the niobium-aluminum precursor wire. The present invention provides a niobium-aluminum precursor wire and a twisted wire using the same, the niobium-aluminum precursor wire including: a rod-like winding core (5) formed of a stabilized copper, or a stabilized copper and an unstabilized copper; a laminated body (3) that is wound around the winding core (5) and that is formed of an aluminum foil and a niobium foil laminated one on the other; and a covering body (1) that covers the circumference of the laminated body and that is formed of a stabilized copper, or a stabilized copper and an unstabilized copper. The volume ratio of the stabilized copper with respect to the unstabilized copper contained in the precursor wire is 0.5-2.0, and the volume ratios of the stabilized copper contained in the winding core (5) and the covering body (1) are within prescribed ranges. According to the present invention, a superconducting wire and a superconducting twisted wire are provided by thermally treating the precursor wire and the twisted wire.