Method of producing coating using negative DC pulses with specif

Details Method of producing coating using negative DC pulses with specif Method of producing coating using negative DC pulses with specif

1990-11-14

1993-03-09

Padgett, Marianne

Coating processes

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

Plasma

427580, 427564, B05D 306

Patent

active

051925788

ABSTRACT:
For coating workpieces having basic bodies (3), with a ceramic, electrically non-conducting material, during the coating process a pulsating dc voltage is applied to the basic bodies (3) or their holders (36). Preferably the pulse height is changed during vaporization used for the coating process, from high negative values to smaller negative values. A further layer can be applied onto the workpieces coated in this way whereby these work-pieces, due to their excellent corrosion resistance, are suited as pieces of jewelry which can be exposed in particular to ocean water and body perspiration, as rolling bodies in which the use of oil or grease as corrosion protection can be dispensed with, and as separating and cutting tools for organic materials.

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Ahmed et al., 4 EME Collogue Intern. Sur Les Plasmas et La Pulverization 13-17 Sep. 1982.
Tatsuo O Mori, Japanese Abstract, vol. 13, #134 (C-581) Apr. 4, 1989, Ap #63-297551, "Ion Current Forming Device".
Masayasu Nigami, "Film Forming Device", Japanese Abstract, vol. 13, #134 (C-581) Apr. 4, 1989 Ap. #63-297552.

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