Coating processes – Direct application of electrical – magnetic – wave – or... – Ion plating or implantation
Patent
1995-03-08
1995-10-17
Pianalto, Bernard
Coating processes
Direct application of electrical, magnetic, wave, or...
Ion plating or implantation
427249, 427255, 4272557, 427327, 427331, 427399, 4274191, 4274197, 427435, 427523, 427528, 427530, 427534, 427535, 427577, B05D 306
Patent
active
054589274
ABSTRACT:
A process for forming an adherent diamond-like carbon coating on a workpiece of suitable material such as an aluminum alloy is disclosed. The workpiece is successively immersed in different plasma atmospheres and subjected to short duration, high voltage, negative electrical potential pulses or constant negative electrical potentials or the like so as to clean the surface of oxygen atoms, implant carbon atoms into the surface of the alloy to form carbide compounds while codepositing a carbonaceous layer on the surface, bombard and remove the carbonaceous layer, and to thereafter deposit a generally amorphous hydrogen-containing carbon layer on the surface of the article.
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Conrad et al, "Plasma Source Ion Implantation: A New, Cost-Effective, Non-Line-of-Sight Technique for Ion Implantation of Materials", Surface and Coatings Technology, 36 (1988) 927-937 (No month available).
Grill et al, "Interface Modifications for Improving the Adhesion of a-C:H films to Metals", Journal of Materials Research, vol. 3, No. 2, Mar./Apr. 1988, pp. 214-217.
Harris et al, "A Diamond-Like Carbon Film for Wear Protection of Steel", Surface and Coatings Technology, 62 (1993) 550-557 (No month available).
Wood et al, "Initial Operation of a Large-Scale Plasma Source Ion Implantation Experiment", J. Vac. Sci. Technol. B, vol. 12, No. 2, Mar./Apr. 1994, pp. 870-874.
Elmoursi Alaa A.
Hamdi Aboud H.
Malaczynski Gerard W.
Mantese Joseph V.
Nastasi Michael A.
General Motors Corporation
Grove George A.
Pianalto Bernard
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