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Silicon nitride having a high tensile strength

United States Patent

*** EXPIRED ***
November 5, 1996
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A silicon nitride ceramic comprising: a) inclusions no greater than 25 microns in length, b) agglomerates no greater than 20 microns in diameter, and c) a surface finish of less than about 8 microinches, said ceramic having a four-point flexural strength of at least about 900 MPa.
Pujari; Vimal K. (Northboro, MA), Tracey; Dennis M. (Medfield, MA), Foley; Michael R. (Oxford, MA), Paille; Norman I. (Oxford, MA), Pelletier; Paul J. (Millbury, MA), Sales; Lenny C. (Grafton, MA), Willkens; Craig A. (Sterling, MA), Yeckley; Russell L. (Oakham, MA)
Saint-Gobain/Norton Industrial Ceramics Corporation (Worcester, MA)
08/ 324,937
October 18, 1994
STATEMENT OF GOVERNMENT SUPPORT This invention was developed under U.S. Government Contract No. DE-AC05-84OR21400 awarded by The United States Department of Energy.