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. 22, 2013
Filed:
Aug. 24, 2009
Tai-il Mah, Arlington, VA (US);
Kristin A. Keller, Springboro, OH (US);
Michael K. Cinibulk, Bellbrook, OH (US);
Tai-Il Mah, Arlington, VA (US);
Kristin A. Keller, Springboro, OH (US);
Michael K. Cinibulk, Bellbrook, OH (US);
The United States of America as represented by the Secretary of the Air Force, Washington, DC (US);
Abstract
The current invention provides a method to fabricate a crack-free continuous fiber-reinforced ceramic matrix composite by eliminating shrinkage stresses through a unique combination of freeze forming and a non-shrinking matrix composition. Cracks related to drying shrinkage are eliminated through freeze forming and cracks related to sintering shrinkage are eliminated by using a matrix that does not shrink at the given sintering temperature. After sintering, a crack-free ceramic composite is obtained.