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US 4,070,207 AGranted
Method of producing porous copper workpieces and product thereof
OwnerLouis B. Holdemaninventor
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Abstract
Porous copper workpieces are obtained by A. obtaining a copper workpiece having a selected grain size; B. machining the workpiece to a selected size and shape; C. electrochemically polishing said workpiece; D. annealing said workpiece from step (c) in oxygen at a temperature from 750.degree. to 1080.degree. C. and a pressure of 10.sup.-4 - 10.sup.2 Torr; and E. annealing said workpiece from step (d) in hydrogen.
Claims4
A method of making porous copper workpieces of average pore diameter below 10 - 15 microns comprising the steps of:
- a. obtaining a copper workpiece having a selected grain size;
- b. matching the workpiece to a selected size or shape;
- c. electrochemically polishing said workpiece;
- d. annealing said workpiece from step (c) in an oxygen atmosphere at 750.degree. - 1080.degree. C. and 10.sup.-4 - 10.sup.2 Torr for 2 - 72 hours;
- and
- e. annealing said workpiece from step (d) in hydrogen at 750.degree. - 1080.degree. C. and 10.sup.-3 - 10.sup.+3 Torr for 2 - 72 hours.
3 more elements
Dependencies are inferred from the claim text.