The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 2011
Filed:
Mar. 17, 2009
Tomohiro Wada, Tokyo, JP;
Tomoyuki Haneji, Tokyo, JP;
Shinichi Takahashi, Hiratsuka, JP;
Kiichi Kanda, Hiratsuka, JP;
Kenichi Watanabe, Hiratsuka, JP;
Tomohiro Wada, Tokyo, JP;
Tomoyuki Haneji, Tokyo, JP;
Shinichi Takahashi, Hiratsuka, JP;
Kiichi Kanda, Hiratsuka, JP;
Kenichi Watanabe, Hiratsuka, JP;
Taiyo Nippon Sanso Corporation, Tokyo, JP;
Abstract
Disclosed is a process of producing a porous metal body containing a metal component which is likely to be oxidized, by which process the amounts of residual carbon and residual oxygen therein are decreased, and by which the performance of the product porous body can be largely promoted. The process for producing a porous metal body by sintering a material of the porous metal body, which material is obtained by coating a slurry containing a metal powder and an organic binder on an organic porous aggregate, comprises a defatting step of treating the material of the porous metal body at a temperature not higher than 650° C. in an atmosphere containing carbon monoxide and carbon dioxide; a decarbonization step of treating the material of the porous metal body after the defatting step in an inert atmosphere or vacuum atmosphere at a temperature not higher than sintering temperature; and a sintering step of retaining the material of the porous metal body after the decarbonization step in an inert atmosphere, vacuum atmosphere, hydrogen atmosphere, or in a reducing atmosphere containing hydrogen gas and an inert gas at a temperature not higher than the melting point of the metal powder.