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Title: Structural silicon nitride materials containing rare earth oxides

Abstract

A ceramic composition suitable for use as a high-temperature structural material, particularly for use in apparatus exposed to oxidizing atmospheres at temperatures of 400 to 1600.degree. C., is found within the triangular area ABCA of the Si.sub.3 N.sub.4 --SiO.sub.2 --M.sub.2 O.sub.3 ternary diagram depicted in FIG. 1. M is selected from the group of Yb, Dy, Er, Sc, and alloys having Yb, Y, Er, or Dy as one component and Sc, Al, Cr, Ti, (Mg +Zr) or (Ni+Zr) as a second component, said alloy having an effective ionic radius less than 0.89 A.

Inventors:
 [1]
  1. (Pittsburgh, PA)
Issue Date:
OSTI Identifier:
863719
Patent Number(s):
4234343
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
DOE Contract Number:  
E(40-1)-5210
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
structural; silicon; nitride; materials; containing; rare; earth; oxides; ceramic; composition; suitable; high-temperature; material; particularly; apparatus; exposed; oxidizing; atmospheres; temperatures; 400; 1600; degree; found; triangular; abca; -sio; -m; ternary; diagram; depicted; fig; selected; alloys; component; mg; zr; alloy; effective; ionic; radius; 89; composition suitable; earth oxides; structural material; materials containing; earth oxide; ceramic composition; silicon nitride; rare earth; oxidizing atmosphere; temperature structural; containing rare; oxidizing atmospheres; ionic radius; nitride material; /501/

Citation Formats

Andersson, Clarence A. Structural silicon nitride materials containing rare earth oxides. United States: N. p., 1980. Web.
Andersson, Clarence A. Structural silicon nitride materials containing rare earth oxides. United States.
Andersson, Clarence A. Tue . "Structural silicon nitride materials containing rare earth oxides". United States. https://www.osti.gov/servlets/purl/863719.
@article{osti_863719,
title = {Structural silicon nitride materials containing rare earth oxides},
author = {Andersson, Clarence A.},
abstractNote = {A ceramic composition suitable for use as a high-temperature structural material, particularly for use in apparatus exposed to oxidizing atmospheres at temperatures of 400 to 1600.degree. C., is found within the triangular area ABCA of the Si.sub.3 N.sub.4 --SiO.sub.2 --M.sub.2 O.sub.3 ternary diagram depicted in FIG. 1. M is selected from the group of Yb, Dy, Er, Sc, and alloys having Yb, Y, Er, or Dy as one component and Sc, Al, Cr, Ti, (Mg +Zr) or (Ni+Zr) as a second component, said alloy having an effective ionic radius less than 0.89 A.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

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