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Title: Silicon nitride having a high tensile strength

A silicon nitride ceramic is disclosed 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. 4 figs.
Inventors:
; ; ; ; ; ; ;
Issue Date:
OSTI Identifier:
392647
Assignee:
Saint-Gobain/Norton Industrial Ceramics Corp., Worcester, MA (United States) PTO; SCA: 360203; 360202; PA: EDB-96:166118; SN: 96001682406
Patent Number(s):
US 5,571,760/A/
Application Number:
PAN: 8-324,937
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 5 Nov 1996
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SILICON NITRIDES; MICROSTRUCTURE; MECHANICAL PROPERTIES; FLEXURAL STRENGTH; TENSILE PROPERTIES; FABRICATION