Process for producing porous metal films and articles produced thereby
Abstract
Abstract A PROCESS FOR PREPARING A METALLIC FILM WITH SUBSTANTIALLY PARALLEL AND UNIFORM APERTURES OF SMALL CROSS-SECTION AND UNIFORM DISTRIBUTION USEFUL AS A FILTER. AN ALLOY IS CAST WHICH IN THE SOLID STATE IS COMPRISED OF AT LEAST TWO PHASES. THE CAST ALLOY IS DIRECTIONALLY SOLIDIFIED TO PRODUCE A BODY WHEREIN ONE OF THE PLASES IS PRESENT AS A PLURALITY OF SUBSTANTIALLY PARALLEL RODS PASSING THROUGH A MATRIX COMPRISED OF THE SECOND OR OTHER PHASES. THE DIRECTIONALLY-SOLIDIFIED BODY IS ETCHED TO REMOVE THE RODLIKE PHASE TO FORM STRAIGHT-THROUGH APERTURES OR, IF DESIRED, RECESSES. A MATERIAL IS PLACED ON AN ETCHED AREA OF THE ETCHED BODY TO FORM A NEGATIVE REPLICA OF THE RECESSES OR HOLES. THE MATERIAL IS THEN STRIPPED AWAY AND METAL IS DEPOSITED ON ITS NEGATIVE REPLICA SURFACE. THE RESULTING DEPOSITED METALLIC FILM IS THEN RECOVERED. D R A W I N G
Inventors
- 👤 Robert R Russell
- 👤 Harvey E Cline
- 👤 Warren De Sorbo
Bibliographic Details
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