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Silicon nitride having a high tensile strength

Patent ·
OSTI ID:870675
 [1];  [2];  [3];  [3];  [4];  [5];  [6];  [7]
  1. Northboro, MA
  2. Medfield, MA
  3. Oxford, MA
  4. Millbury, MA
  5. Grafton, MA
  6. Sterling, MA
  7. Oakham, MA
+ Show Author Affiliations

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.

Research Organization:
LOCKHEED MARTIN ENRGY SYST INC
DOE Contract Number:
AC05-84OR21400
Assignee:
Saint-Gobain/Norton Industrial Ceramics Corporation (Worcester, MA)
Patent Number(s):
US 5571760
OSTI ID:
870675
Country of Publication:
United States
Language:
English

References (3)

Analysis of Fracture Strength of Si3N4 using Weibull's Multi-Modal Distribution journal January 1992
Development of Improved Processing and Evaluation of Silicon Nitride
  • Pujari, V. K.; Amin, K. E.; Tewari, P. H.
  • ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General https://doi.org/10.1115/91-GT-317
conference March 2015
Microstructure and Properties of Self-Reinforced Silicon Nitride journal November 1993

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Related Subjects

/501/
20
25
900
agglomerates
ceramic
ceramic comprising
comprising
diameter
finish
flexural
flexural strength
four-point
inclusions
length
microinches
microns
mpa
nitride
nitride ceramic
silicon
silicon nitride
strength
surface
surface finish
tensile
tensile strength