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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]
  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 Lab. (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
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.
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.
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.
@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}
}

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