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:
May. 11, 1993
Filed:
Jul. 13, 1992
Applicant:
Inventors:
Edgar E Graham, Lyndhurst, OH (US);
James F Makki, Naperville, IL (US);
Assignee:
Cleveland State University, Cleveland, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
427255 ; 4272556 ; 427299 ; 4274192 ; 4274195 ;
Abstract
A method is disclosed to provide a ceramic article with a protective coating which resists mechanical wear at elevated temperatures up to 500.degree. C. and higher. The coating is applied by first chemically depositing the oxide product layer of a transition metal element on the uncoated ceramic surface and thereafter vapor depositing an adherent organic polymer lubricating film on the oxide product layer. Ceramic materials provided with such protective coating include silicon carbide, silicon nitride and vitreous silica.