Chemistry: electrical and wave energy – Processes and products
Patent
1986-01-03
1987-03-24
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204DIG9, C25D 510, C25D 512
Patent
active
046523480
ABSTRACT:
The present invention relates to a method for the electrodeposition of an ordered alloy structured in alternate discrete layers said alloys possessing high elastic modulus and adjustable magnetic susceptibility. According to the invention, the electrodeposition of at least two metals, characterized by a redox potential gap of at least 0.1 V between said metals, is obtained by the pulse plating technique with a frequency in the range of 0.02 Hertz to 15 Hertz. The concentrations of the noblest metal in the electrodeposition solution should be in the range of 0.001M to 2.0M while that of the less noble metal is about its saturation at room temperature. The discrete layers obtained according to the method are less than 90 Angstroms thickness, being substantially pure. Examples of the metals to be electrodeposited according to the invention are copper-nickel; copper-palladium; nickel-gold; copper-nickel-iron and corresponding alloys with cobalt or iron replacing nickel.
REFERENCES:
patent: 3480522 (1969-11-01), Brownlow
T. Tsakalos et al., "Interdiffusion in Composition Modulated Copper-Nickel Thin Films", J. Phys., Collog., 1977, 7, 404-405.
D. Baral et al., "Historical Survey of Artificially Prepared Composition Modulated Structures," from Ph.D Thesis entitled On the Mechanical and Thermoelectric Behavior of Composition Modulated Foils, Northwestern Univ., Jun. 1983.
D. Baral et al., "On the Mechanical and Thermoelectric Behavior of Composition Modulated Foils," Dissertation Abstracts International, vol. 44/09-B, p. 2858.
D. Tench et al., "Enhanced Tensile Strength for Electrodeposited Nickel-Copper Multilayer Composites," Metallurgical Transactions A, vol. 15A, Nov. 1984, 2039-40.
Yahalom Joseph
Zadok Ori
Kaplan G. L.
Technion Research & Development Foundation Ltd.
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