Wire and method for manufacturing wire

Patent metadata

Field	Value
Publication number	US-2024344202-A1
Application number	US-202218292631-A
Country	US
Kind code	A1
Filing date	Aug 18, 2022
Priority date	Sep 24, 2021
Publication date	Oct 17, 2024
Grant date	—

Abstract

Provided is a wire having a core wire and a coating layer positioned on the outer periphery of the core wire, wherein the core wire consists essentially of aluminum or an aluminum alloy; the coating layer consists essentially of nickel or a nickel alloy; on the core wire, an area ratio of portions not being coated with the coating layer is lower than 0.01%; the wire further has a first element; and the first element is at least one selected from the group consisting of iron, magnesium, silicon, copper, zinc, nickel, manganese, silver, chromium and zirconium.

First claim

What is claimed:

1 . A wire, comprising:
a core wire; and a coating layer positioned on an outer periphery of the core wire, wherein the core wire consists essentially of aluminum or an aluminum alloy; the coating layer consists essentially of nickel or a nickel alloy; on the core wire, an area ratio of portions not being coated with the coating layer is lower than 0.01%; the wire further comprises a first element; and the first element is at least one selected from the group consisting of iron, magnesium, silicon, copper, zinc, nickel, manganese, silver, chromium and zirconium.

2 . The wire according to claim 1 ,
wherein the wire further comprises an anchor particle comprising the first element and an oxide of the first element; and the anchor particle is present straddling an interface between the core wire and the coating layer.

3 . The wire according to claim 2 , wherein the anchor particle has a particle diameter of 0.1 μm or more and 50 μm or less.

4 . The wire according to claim 1 , further comprising an interdiffusion layer between the core wire and the coating layer,
wherein the interdiffusion layer comprises aluminum, nickel and oxygen.

5 . The wire according to claim 4 ,
wherein the interdiffusion layer comprises a base layer positioned on the core wire side and a composite layer positioned on the coating layer side; the base layer has a higher content of aluminum than a content of nickel; and the composite layer has a higher content of nickel than a content of aluminum.

6 . The wire according to claim 4 , wherein the interdiffusion layer has an average thickness of 10 nm or more and 250 nm or less.

7 . The wire according to claim 4 , wherein the interdiffusion layer has an average thickness of 50 nm or more and 250 nm or less.

8 . The wire according to claim 1 , wherein the coating layer has an average thickness of 3 μm or more and 15 μm or less.

9 . The wire according to claim 1 , wherein the wire has a diameter of 0.04 mm or more and 4 mm or less.

10 . A method for manufacturing a wire comprising a core wire and a coating layer positioned on an outer periphery of the core wire, the method comprising:
preparing the core wire consisting essentially of aluminum or an aluminum alloy; carrying out degreasing to remove oil content adhered on a surface of the core wire; carrying out an etching treatment to remove an oxide film present on a surface of the core wire and containing aluminum oxide as a main component; carrying out electroless plating to form a nickel coating on a surface of the core wire having been subjected to the etching treatment; forming the coating layer consisting essentially of nickel or a nickel alloy on a surface of the core wire having the nickel coating formed thereon; and subjecting the core wire having the coating layer formed thereon to wire drawing, wherein the wire further comprises a first element; the first element is at least one selected from the group consisting of iron, magnesium, silicon, copper, zinc, nickel, manganese, silver, chromium and zirconium; and a solubility of aluminum oxide to an etching solution to be used for the etching treatment is higher than a solubility of aluminum to the etching solution.

11 . The method for manufacturing a wire according to claim 10 ,
wherein the wire further comprises an anchor particle comprising the first element and an oxide of the first element; and the anchor particle is present straddling an interface between the core wire and the coating layer.

12 . The method for manufacturing a wire according to claim 10 , wherein an etching time in the etching treatment is 1 min or longer and 5 min or shorter.

13 . The method for manufacturing a wire according to claim 10 , wherein the etching solution comprises sulfamic acid or a sulfamate salt.

14 . The method for manufacturing a wire according to claim 10 , further comprising subjecting the core wire having the coating layer formed thereon to a heat treatment at a temperature of 300° C. or more and 600° C. or less to form an interdiffusion layer comprising aluminum, nickel and oxygen between the core wire and the coating layer.

Assignees

• Sumitomo Electric Industries

Inventors

• Takeyama Tomoharu
• Kureishi Yusuke
• Hosoe Akihisa

Classifications

• C23C18/1844

  with use of organic or inorganic compounds other than metals, first · CPC title

• C23C18/34

  using reducing agents · CPC title

• C23C18/1653

  Two or more layers with at least one layer obtained by electroless plating and one layer obtained by electroplating · CPC title

• C23C18/1637

  metallic substrate · CPC title

• C25D7/0607

  Wires · CPC title