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Title: Silicon nitride having a high tensile strength

Abstract

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.

Inventors:
 [1];  [2];  [3];  [3];  [4];  [5];  [6];  [7]
+ Show Inventor Affiliations
  1. Northboro, MA
  2. Medfield, MA
  3. Oxford, MA
  4. Millbury, MA
  5. Grafton, MA
  6. Sterling, MA
  7. Oakham, MA
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
870675
Patent Number(s):
5571760
Assignee:
Saint-Gobain/Norton Industrial Ceramics Corporation (Worcester, MA)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
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DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
silicon; nitride; tensile; strength; ceramic; comprising; inclusions; 25; microns; length; agglomerates; 20; diameter; surface; finish; microinches; four-point; flexural; 900; mpa; surface finish; ceramic comprising; silicon nitride; tensile strength; nitride ceramic; flexural strength; /501/

Citation Formats

Pujari, Vimal K, Tracey, Dennis M, Foley, Michael R, Paille, Norman I, Pelletier, Paul J, Sales, Lenny C, Willkens, Craig A, and Yeckley, Russell L. Silicon nitride having a high tensile strength. United States: N. p., 1996. Web.
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Pujari, Vimal K, Tracey, Dennis M, Foley, Michael R, Paille, Norman I, Pelletier, Paul J, Sales, Lenny C, Willkens, Craig A, & Yeckley, Russell L. Silicon nitride having a high tensile strength. United States.
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Pujari, Vimal K, Tracey, Dennis M, Foley, Michael R, Paille, Norman I, Pelletier, Paul J, Sales, Lenny C, Willkens, Craig A, and Yeckley, Russell L. Mon . "Silicon nitride having a high tensile strength". United States. https://www.osti.gov/servlets/purl/870675.
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@article{osti_870675,
title = {Silicon nitride having a high tensile strength},
author = {Pujari, Vimal K and Tracey, Dennis M and Foley, Michael R and Paille, Norman I and Pelletier, Paul J and Sales, Lenny C and Willkens, Craig A and Yeckley, Russell L},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {1}
}
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Works referenced in this record:

Microstructure and Properties of Self-Reinforced Silicon Nitride
journal, November 1993

Analysis of Fracture Strength of Si3N4 using Weibull's Multi-Modal Distribution
journal, January 1992

Development of Improved Processing and Evaluation of Silicon Nitride
conference, March 2015

  • 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
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