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:
Jan. 23, 2001
Filed:
Sep. 29, 1999
David S Rickerby, Derby, GB;
Rolls-Royce, PLC., London, GB;
Abstract
A method of applying a coating to a metallic article (,) comprises placing the metallic article within a hollow cathode (,) in a vacuum chamber (,), evacuating the vacuum chamber (,), applying a negative voltage to the hollow cathode (,) to produce a plasma and such that the material of the hollow cathode (,) is sputtered onto the metallic article (,) to produce a coating (,). A positive voltage (V,) is applied to the metallic article (,) to attract electrons from the plasma to heat the coating (,) and so inter-diffuse the elements of the metallic article (,) and the protective coating (,) and a negative voltage (V,) is applied to the metallic article (,) to attract ions from the plasma to bombard the coating (,) to minimize defects in the coating (,).