Nickel-cobalt-boron alloy, implement, plating solution and method for making same
AssigneeDiamond Technologies Company
InventorLuis X. Caballero
Life of this patent
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Abstract
A dense, smooth, ductile, hard, highly reflective, corrosion-resistant, temperature resistant, and wear-resistant crystalline alloy of nickel, cobalt and boron. The alloy is epitaxially electrodeposited on an activated substrate using a pulsed square wave current. The epitaxial deposition occurs in an electrolytic bath containing nickel ions, cobalt ions, complexing agents, and an amino borane compound at a moderately low pH level and moderate temperature. An insoluble, solid catalyst, preferably palladium, causes the alloy to diffuse into the surface of the substrate and become bonded by a polar-covalent bond to it. Implements coated with the alloy, as well as plating solutions and methods for making the alloy are also disclosed.
Claims14
A method of depositing a ternary alloy consisting essentially of nickel, cobalt, and boron on a substrate, the method comprising:
- preparing a plating bath of nickel, cobalt and boron ions;
- placing a catalyst in the plating bath, the catalyst being selected from the group consisting of the elements of group VIII of the periodic Table, except nickel;
- electrolytically depositing the nickel, cobalt, and boron ions forming a coating of the ternary alloy on the substrate.
An electroplating bath for coating a substrate, said bath comprising, per liter of bath, 1.00-1.41 moles nickel salt, 0.06-0.125 moles cobalt salt, approximately 0.5 mole boric acid, and approximately 0.0125 mole of an amino-borane and said coating is a ternary alloy coating consisting essentially of nickel, cobalt and boron.
A method of forming a foil of a ternary alloy consisting essentially of nickel, cobalt, and boron, the method comprising electrolytically depositing nickel, cobalt and boron as said alloy on an unactivated substrate, said substrate having a low conductivity.
Dependencies are inferred from the claim text.