The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 1995
Filed:
Mar. 08, 1995
Gerard W Malaczynski, Bloomfield Hills, MI (US);
Xiaohong Qiu, Sterling Heights, MI (US);
Joseph V Mantese, Troy, MI (US);
Alaa A Elmoursi, Troy, MI (US);
Aboud H Hamdi, Warren, MI (US);
Blake P Wood, Los Alamos, NM (US);
Kevin C Walter, Los Alamos, NM (US);
Michael A Nastasi, Espanola, NM (US);
General Motors Corporation, Detroit, MI (US);
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.