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:
Aug. 24, 1993
Filed:
Mar. 30, 1992
Iftikhar Ahmad, Fairfax, VA (US);
Edward L Paquette, Severna Park, MD (US);
Richard Silberglitt, Fairfax, VA (US);
Technology Assessment & Transfer, Inc., Annapolis, MD (US);
Abstract
A method for the production of ceramic matrix composites by chemical vapor infiltration. The method includes exposing an infiltrated preform to microwave energy, with pressure variation of the reactant gases in the processing chamber and/or temperature variation of the preform during processing, to produce substantially improved composites. The process provides higher deposition rates within the core of the ceramic matrix composite, higher densification which advantageously initiates within the interior of the ceramic matrix composite and proceeds radially outward, and a thick wall ceramic matrix composite with an overall reduced density gradient.