C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 1/08 (2006.01) B01D 39/20 (2006.01) B22C 9/06 (2006.01) B22F 3/11 (2006.01) B22F 3/15 (2006.01) B22F 5/00 (2006.01)
Patent
CA 2160857
The porous metal body of the inventtion has a porosity of 7 to 50%, pore sizes of 1 to 500 µm and a pore distribution satisfying the relationship of: (D95 - D5)/D50 ? 2.5 wherein D5 is the pore size on the cumulative distribu- tion curve of the pore sizes at a cumulative frequency of 5%, D50 is the pore size on the curve at a cumulative frequency of 50% and D95 is the pore size on the curve at a cumulative frequency of 95%. The porous body is improved in porosity characteristics and mechanical strength. The porous metal body is prepared by pressing a metal powder to shape and sintering the shaped body by hot isostatic pressing, or alternatively by enclosing a metal powder in a capsule, subjecting the encapsulated powder to a primary sintering treatment in an isostatic medium to form a primary sintered porous body and heat- treating the sintered body with the capsule removed or without removing the capsule.
Funakoshi Jun
Kosaka Akira
Motoki Ryutaro
Nishi Takashi
Kubota Corporation
Ridout & Maybee Llp
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