Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Powder pretreatment
Reexamination Certificate
2007-09-21
2010-10-12
King, Roy (Department: 1793)
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Powder pretreatment
C419S041000
Reexamination Certificate
active
07811512
ABSTRACT:
A method for producing a sintered body is provided. The method for producing the sintered body comprising: forming a green body by molding a composition for forming a green body into a specified shape to obtain the green body, the composition comprising powder constituted of a metallic material and a binder containing a first resin which is decomposable by ozone; first debinding the green body by exposing the green body to a high ozone content atmosphere to decompose the first resin and remove the decomposed first resin form the green body to obtain a brown body; exposing the thus obtained brown body at least once to a low ozone content atmosphere whose ozone concentration is lower than an ozone concentration of the high ozone content atmosphere to obtain an intermediate brown body; and sintering the intermediate brown body which has been exposed to the low ozone content atmosphere to obtain the sintered body. By using the composition mentioned above, it is possible to safely, easily and cost-effectively produce a metal sintered body having a reduced metal oxide amount and improved properties (dimensional accuracy). Such a sintered body is also provided.
REFERENCES:
patent: 4795598 (1989-01-01), Billiet
patent: 5032354 (1991-07-01), Nakanishi et al.
patent: 5080846 (1992-01-01), Kim et al.
patent: 5332537 (1994-07-01), Hens et al.
patent: 5362791 (1994-11-01), Ebenhoech et al.
patent: 5531958 (1996-07-01), Krueger
patent: 5746960 (1998-05-01), Kasai et al.
patent: 5860055 (1999-01-01), Hesse et al.
patent: 6051184 (2000-04-01), Kankawa
patent: 6682582 (2004-01-01), Speidel
patent: 6846862 (2005-01-01), Schofalvi et al.
patent: 2003/0164570 (2003-09-01), Arrimadas Matias
patent: 2006/0099103 (2006-05-01), Wohlfromm et al.
patent: 1559984 (2005-01-01), None
patent: 0 413 231 (1993-06-01), None
patent: 05-043304 (1993-02-01), None
patent: 06-263548 (1994-09-01), None
patent: B-3128130 (2000-11-01), None
patent: 2006-265659 (2006-10-01), None
patent: 2006-265660 (2006-10-01), None
patent: 2006-265661 (2006-10-01), None
patent: 2006-283159 (2006-10-01), None
Hayashi Junichi
Sakata Masaaki
Harness & Dickey & Pierce P.L.C.
King Roy
Mai Ngoclan T
Seiko Epson Corporation
LandOfFree
Method for producing sintered body and sintered body does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing sintered body and sintered body, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing sintered body and sintered body will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4221228