Stock material or miscellaneous articles – All metal or with adjacent metals – Having composition – density – or hardness gradient
Patent
1991-06-20
1993-12-07
Niebling, John
Stock material or miscellaneous articles
All metal or with adjacent metals
Having composition, density, or hardness gradient
205170, 205181, 205182, 428457, 428469, 428635, B32B 514
Patent
active
052682358
ABSTRACT:
A process for the production of a composition modulated alloy having a predetermined concentration is disclosed, in which alternating layers of at least two metals are successively deposited upon a substrate by electrodeposition, vacuum deposition, vapor deposition, or sputtering. The individual thicknesses of at least one metal's layers are varied in a predetermined manner. Pulsed galvanostatic electrodeposition using a tailored waveform is preferred. A copper-nickel concentration graded alloy is disclosed. Concentration graded alloys of predetermined concentration having at least one region of local homogeneity are also disclosed. The region of local homogeneity has a thickness corresponding to the thickness of two adjacent layers of different metals which have been diffusion annealed together. A pulsed electrodeposition/diffusion anneal process for production of such alloys is also disclosed. An electro-chemical deposition method is also disclosed for the production of a non-layered, continuous concentration graded alloy.
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Dariel Moshe P.
Lashmore David S.
Leader W. T.
Niebling John
The United States of America as represented by the Secretary of
Wasserman Fran
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