Stock material or miscellaneous articles – All metal or with adjacent metals – Having composition – density – or hardness gradient
Patent
1989-04-14
1990-12-11
Zimmerman, John J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having composition, density, or hardness gradient
428613, 2041291, 204140, B32B 518, C25F 314
Patent
active
049770381
ABSTRACT:
Micro- and nano-porous metal structures including an alloy of one or more noble metals and substantially uniform and interconnected porosity in pore sizes ranging from three nanometers to 10 micrometers produced by a process including the following steps: mixing at least two metals having different electrochemical activity, according to predetermined proportions to form a multi-metallic alloy; contacting said alloy with an electrolyte; and applying an electrochemical potential to said electrolyte wherein said alloy acts as the anode until all or a portion of the more electrochemically active metal is dissolved from the alloy leaving porous metal.
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Newman Roger C.
Sieradzki Karl
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