Extended surface area amorphous metallic material

Details Extended surface area amorphous metallic material Extended surface area amorphous metallic material

1984-09-10

1986-08-26

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Porous

148 131, 148 132, 148 14, 148403, 156656, 502439, C22F 100, C21D 900, C23F 100, B01J 3200

Patent

active

046083197

ABSTRACT:
An extended surface area amorphous metallic article and process for preparation thereof, wherein a homogeneous amorphous metallic alloy is phase-separated to produce two interconnected, internally continuous, amorphous phases, and then one phase is removed. Preferably, the homogeneous metallic alloy has a composition associated with a eutectic between at least two solid solutions. Phase separation is accomplished by exposing the alloy to a temperature which is below the crystallization temperature and also below the phase separation temperature for that composition. Removal of one phase may be accomplished by leaching in a liquid solution, or by vaporization. The resulting article has an extended surface area of the amorphous phase that is not removed. A porous membrane having extended internal surface area may be prepared by continuing the removal process to the removal of one phase throughout the entire thickness of the article. The extended surface area articles, wherein the extended surface area is of an amorphous metal, enjoy particular advantages when used as catalysts.

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patent: 3594292 (1971-07-01), Russel et al.
patent: 3615900 (1971-10-01), Lee
patent: 3775176 (1973-11-01), Cross et al.

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