Title:
METHOD FOR PRODUCING Ag-OXIDE-BASED ELECTRICAL CONTACT MATERIAL AND ELECTRICAL CONTACT MATERIAL PRODUCED BY THE METHOD
Document Type and Number:
WIPO Patent Application WO/2012/066826
Kind Code:
A1
Abstract:
[Problem] Conventional Ag-oxide-based electrical contact materials that contain Zn are low in metal formability, which is indispensable to the production of an electrical contact, and are difficult to be rolled. Consequently, conventional Ag-oxide-based electrical contact materials containing Zn have not been put into practical use. [Solution] A method for producing an Ag-oxide-based electrical contact material, wherein an Ag alloy containing Zn is subjected to internal oxidation under the conditions of an oxygen partial pressure of 0.5-5.0 MPa and an oxidation temperature of 600-900°C so that a plurality of fine cracks are generated at grain boundaries, and fine pieces and/or a powder obtained by pulverizing the internally oxidized Ag alloy is formed into a desired shape by compression molding, and then fired and extruded into a predetermined shape.
Inventors:
KUMITA HIDEO (JP)
MAMADA SHINYA (JP)
MAMADA SHINYA (JP)
Application Number:
PCT/JP2011/067374
Publication Date:
May 24, 2012
Filing Date:
July 28, 2011
Export Citation:
Assignee:
TOKURIKI HONTEN KK (JP)
KUMITA HIDEO (JP)
MAMADA SHINYA (JP)
KUMITA HIDEO (JP)
MAMADA SHINYA (JP)
International Classes:
C22C1/05; B22F3/24; B22F9/04; C22C5/06
Domestic Patent References:
| WO2000065623A1 | 2000-11-02 |
Foreign References:
| JP2009030099A | 2009-02-12 | |||
| JPS5967346A | 1984-04-17 | |||
| JPS58152315A | 1983-09-09 |
Attorney, Agent or Firm:
KANAKURA, Kyoji (JP)
Kanekura Takashi 2 (JP)
Kanekura Takashi 2 (JP)
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