Method of hardening metal surfaces

Details Method of hardening metal surfaces Method of hardening metal surfaces

1991-11-25

1993-06-08

Pianalto, Bernard

Coating processes

Direct application of electrical, magnetic, wave, or...

Electrical discharge

427250, 4272551, 427294, 427569, B05D 306

Patent

active

052177483

ABSTRACT:
A coating is provided to a substrate in a vacuum chamber having an electric arc evaporator to form an ion-plasma comprising accelerated ions and neutral atoms of evaporated metal. The substrate contained in the vacuum chamber is provided with a negative voltage bias such that the ion-plasma is drawn to the substrate and deposited on its surface to provide the coating. A pulsed negative voltage bias is maintained on the substrate such that the substrate temperature can be maintained within the range of zero to 200.degree. C.

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