Electrode material

Patent metadata

Field	Value
Publication number	US-9724759-B2
Application number	US-201515122743-A
Country	US
Kind code	B2
Filing date	Feb 17, 2015
Priority date	Mar 4, 2014
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A method for producing an electrode material, involving: (i) a step of preparing a powder of a solid solution of Cr and a heat resistant material selected from the group consisting of Mo, W, Ta, Nb, V and Zr, wherein either a peak corresponding to Cr element or a peak corresponding to the heat resistant element, which are observed by X ray diffraction measurement made on the powder of the solid solution, disappears; (ii) a step of molding the powder of the solid solution to obtain a molded body and then sintering the molded body to produce a sintered body; and (iii) a Cu infiltration step of infiltrating the sintered body with Cu.

First claim

The invention claimed is:

1. A method for producing an electrode material, comprising:
a step of preparing a powder of a solid solution of Cr and a heat resistant material selected from the group consisting of Mo, W, Ta, Nb, V and Zr, wherein either a peak corresponding to Cr element or a peak corresponding to the heat resistant element, which are observed by X ray diffraction measurement made on the powder of the solid solution, disappears;
a step of molding the powder of the solid solution to obtain a molded body and then sintering the molded body to produce a sintered body; and
a Cu infiltration step of infiltrating the sintered body with Cu.

2. A method for producing an electrode material, as claimed in claim 1 , wherein in the powder of the solid solution the volume-based relative particle amount of particles having a particle diameter of 30 μm or less is 50% or more.

3. A method for producing an electrode material, as claimed in claim 1 , wherein the powder of the solid solution has a ratio of Cr to the heat resistant element of 4 or less to 1 by weight.

Assignees

• Meidensha Electric Mfg Co Ltd

Inventors

• Kitakizaki Kaoru
• Ishikawa Keita
• Hayashi Shota
• Suzuki Nobutaka
• Hasegawa Kosuke

Classifications

• B22F1/07

  Metallic powder characterised by particles having a nanoscale microstructure (nanosized particles B22F1/054) · CPC title

• C22C9/00 Primary

  Alloys based on copper · CPC title

• B22F2304/10

  Micron size particles, i.e. above 1 micrometer up to 500 micrometer · CPC title

• B22F2301/20

  Refractory metals · CPC title

• B22F3/16 Primary

  in successive or repeated steps · CPC title