Sumitomo Electric Industries, Limited

Yusuke Kureishi

Akihisa Hosoe

Kengo Goto

Hideaki Sakaida

Tomoharu Takeyama

Yoshimasa Shirai

A metal material comprising: a base material; an oxide layer disposed on a surface of the base material; and a metal layer disposed on a surface of the oxide layer, wherein the base material includes aluminum, the oxide layer includes aluminum, nickel, and oxygen, the metal layer includes nickel, and an average thickness of the oxide layer is no less than 50 nm and no more than 250 nm.

Metal material and method for manufacturing metal material

An aluminum base wire includes a core wire made of pure aluminum or an aluminum alloy and a coating layer provided on an outer periphery of the core wire. The coating layer includes a first layer provided on the outer periphery of the core wire, a second layer provided on an outer periphery of the first layer, and a third layer provided on an outer periphery of the second layer. The first layer is composed of at least one metal selected from the group consisting of nickel, a nickel alloy, copper, and a copper alloy, the second layer is composed of metals that include zinc and tin, the third layer is composed of at least one metal selected from the group consisting of tin and tin alloys that contain substantially no zinc, and a zinc content in the second layer is 15 atomic % or more and 60 atomic % or less.

Aluminum base wire

An aluminum base wire includes a core wire composed of pure aluminum or an aluminum alloy; a plurality of coating pieces provided so as to be scattered on an outer periphery of the core wire; and a coating layer provided on the outer periphery of the core wire and an outer periphery of each of the plurality of coating pieces. The coating layer includes a first layer that is provided continuously on the outer periphery of the core wire between adjacent coating pieces and the outer periphery of each of the plurality of coating pieces, and a second layer provided on an outer periphery of the first layer. The plurality of coating pieces are each composed of copper or a copper alloy, the first layer is composed of metals that include copper and tin, and the second layer is composed of tin or a tin alloy.

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Osaka, Japan

Yusuke Kureishi