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Title:
POROUS METAL AND METHOD OF PRODUCING THE SAME
Document Type and Number:
Japanese Patent JP2004043937
Kind Code:
A
Abstract:

To provide a porous metal having a size of voids of ≤1 mm and a void fraction of ≥60% for which only limited production methods were available in the conventional technique, and to provide the method of producing the same.

Metal powder comprising one or more components is sealed together with a gas of a pressure equal to or greater than the atmospheric pressure into the inside of a metallic vessel which can be plastically worked. The metallic vessel is pressurized at a high temperature to sinter the metal powder and to compress the gas. Next, the sintered compact comprising the high pressure gas is heated to a solid-liquid two phase state, and the volume of the gas in a solid-liquid two phase state is expanded to form voids. Thus, the porous metal comprising voids of ≤1 mm and having a void fraction of ≥60% is produced.


Inventors:
MABUCHI MAMORU
CHINO YASUMASA
IWASAKI HAJIME
OBATA MASAAKI
NAKANISHI HIDEYUKI
Application Number:
JP2002206384A
Publication Date:
February 12, 2004
Filing Date:
July 16, 2002
Export Citation:
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Assignee:
NAT INST OF ADV IND & TECHNOL
International Classes:
B22F3/11; C22C1/08; (IPC1-7): C22C1/08; B22F3/11