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. 20, 2005
Filed:
Jul. 15, 2003
Applicants:
Chien-wei LI, Livingston, NJ (US);
Bjoern Schenk, Phoenix, AZ (US);
James V. Guiheen, Madison, NJ (US);
Inventors:
Chien-Wei Li, Livingston, NJ (US);
Bjoern Schenk, Phoenix, AZ (US);
James V. Guiheen, Madison, NJ (US);
Assignee:
Honeywell International, Inc., Morristown, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B035/577 ; C04B035/596 ;
U.S. Cl.
CPC ...
Abstract
Sintered silicon nitride products comprising predominantly β-silicon nitride grains in combination with from about 0.1 to 30 mole % silicon carbide, and grain boundary secondary phases of scandium oxide and scandium disilicate. Such products have high fracture toughness, resistance to recession, and resistance to oxidation at temperatures of at least 1500° C. Methods for preparing sintered silicon nitride products are also disclosed.