Method for metallizing filaments

Coating processes – Electrical product produced – Welding electrode

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427252, 427255, 4272555, 4273762, 427387, 427404, 4274192, B05D 306, C23C 1616

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active

047599502

ABSTRACT:
A method for metallizing a filament, wherein the filament is initially coated with a sol gel dispersion of polysilicate, titania, or alumina, and after drying at elevated temperature to form a porous interlayer coating on the filament, a nickel coating is deposited thereon from gaseous nickel carbonyl in a metallizing zone. The gaseous nickel carbonyl is produced in a fluidized bed of particulate nickel through which carbon monoxide make-up and at least a portion of the effluent gases discharged from the metallizing zone are flowed. The resulting nickel coated filament may be cut into fibers for use as a reinforcement in composite materials such as those utilized in electromagnetic inteference (EMI) shielding applications.

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"Gaseous Plating", Metal Finishing, pp. 79 and 80, Oct. 1949.
Brinker, C. J., et al., "Sol-Gel Transition in Simple Silicates", Journal of Non-Crystalline Solids, 48, 1982, pp. 47-64, North-Holland Publishing Company.
Dislich, H., "Glassy and Crystalline Systems from Gels: Chemical Basis and Technical Application", Journal of Non-Crystalline Solids, 57, 1983, pp. 371-388, North-Holland Publishing Company.
Nogami, M., et al., "Glass Formation Through Hydrolysis of Si(OC.sub.2 H.sub.5).sub.4 with NH.sub.4 OH and HCl Solution", Journal of Non-Crystalline Solids, 37, 1980, pp. 191-120, North-Holland Publishing Company.

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