Dowa Metaltech Co., Ltd.

Yukiya Kato

Hiroto Narieda

Hirotaka Kotani

Tatsuhiro Doi

Takao Tomiya

Yuta Sonoda

Tsuyoshi Ito

Hirotaka Takahashi

A composite material including a composite film formed on a base material, the composite film including a silver layer containing carbon particles, wherein a content of Sb in the composite film is 1 mass % or less, and a crystallite size of silver in the composite film is 40 nm or less.

Composite material, method for producing composite material, and terminal

There is provided a composite plating material and a related technique thereof, the composite plating material including: a base material, and a composite plating layer on the base material, the composite plating layer comprising a composite material containing carbon particles and Sb in an Ag layer, with a carbon content of 6.0 mass % or more and a Sb content of 0.5 mass % or more.

Composite plating material and method for producing the same

There are provided a composite plated product wherein a composite plating film of a composite material containing carbon particles in a silver layer is formed on a base material and wherein the amount of the carbon particles dropped out of the composite plating film is small, and a method for producing the same. After a composite plating film of a composite material containing carbon particles in a silver layer is formed on a base material (of preferably copper or a copper alloy) by electroplating using a silver-plating solution to which the carbon particles are added, a treatment for removing part of the carbon particles on the surface thereof is carried out.

Composite plated product and method for producing same

There are provided a composite plated product, which has little uneven appearance, a low contact resistance and good wear resistance, and a method for producing the same without the need of any silver-plating solutions containing cyanides and any silver-plating solutions containing silver nitrate as a silver salt. After carbon particles are caused to be suspended in water, an oxidizing agent is added thereto for carrying out a wet oxidation treatment of the carbon particles, and a silver-plating solution, which contains at least one sulfonic acid and the carbon particles treated by the wet oxidation treatment, is used for electroplating a base material to form a coating film of a composite material, which contains the carbon particles in a silver layer, on the base material to produce a composite plated product.

There are provided a composite plated product, which has little uneven appearance and good wear resistance, and a method for producing the same without the need of any cyanide-containing silver-plating solutions and any silver-plating solutions containing silver nitrate as a silver salt. A sulfonic-acid-containing silver-plating solution, to which a carbon particle dispersing solution (preferably containing a silicate) is added, is used for electroplating a base material (preferably made of copper or a copper alloy) to form a composite plating film of a composite material, which contains the carbon particles in a silver layer, on the base material to produce a composite plated product.

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Tokyo, Japan

Yukiya Kato