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:
Dec. 23, 2003
Filed:
Sep. 07, 2001
Vinod S. Agarwala, Lexington Park, MD (US);
Alfeo A. Conte, Jr., Warington, PA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
The invention comprises a self-lubricating ceramic composite characterized as having a low porosity derived from a mixture of at least one ceramic powder preferably selected from the group consisting of silicon nitride, silicon carbide, zirconia, alumina, zirconium nitride, tungsten carbide, and titanium carbide; a cemetitious binder, effective amounts of at least one metal silicide, and at least one metal oxide. The ceramic powder mixture can be slurried with sufficient amounts of water and subsequently subjected to pressures of about 6.0 to 7.0 MPa in a mold at temperatures of about 125° to 175° C. to form a self-lubricating ceramic composite capable of maintaining hot-hardness temperatures above 750° C. These self-lubricating ceramic composites are particularly useful in the manufacture of high-performance turbine engines, including engine parts, bearings, gears, rotors and in other areas where high-heat lubricating properties of the ceramic composite are required.