B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
183/110, 75/164
B22F 3/06 (2006.01) B01D 39/20 (2006.01) B22F 3/11 (2006.01) B22F 3/16 (2006.01) B22F 3/22 (2006.01) B22F 3/24 (2006.01)
Patent
CA 1269550
Abstract: A method for making sealess porous metal arti- cles comprising: (a) rotating a mold containing a stabilized suspension of a metal particulate at a rate and for a time such that the particulate is separated from the suspension and distributed on the interior wall of the mold, thereby forming a structure conforming to the interior wall of the mold, the rate of rotation being sufficiently high that at least 100 Gs of cen- trifugal acceleration is achieved at the interior wall of the structure, (b) drying the formed structure to provide a structure having green or unsintered strength, and (c) sintering the dried structure to remove volatile material and fuse the individual particles of the particulate to each other to form the seam- less, porous metal article. Metal articles in accordance with the invention have substantially uniform diameters, thicknesses and pore structures, have Bubble Point ratios of 1.5 or less, and find particular use as filters.
500817
Marks & Clerk
Pall Corporation
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