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Title: Sialon ceramic compositions and methods of fabrication

Abstract

A method of fabricating a SiAlON ceramic body includes: a) combining quantities of Si.sub.3 N.sub.4, Al.sub.2 O.sub.3 and CeO.sub.2 to produce a mixture; b) forming the mixture into a desired body shape; c) heating the body to a densification temperature of from about 1550.degree. C. to about 1850.degree. C.; c) maintaining the body at the densification temperature for a period of time effective to densify the body; d) cooling the densified body to a devitrification temperature of from about 1200.degree. C. to about 1400.degree. C.; and e) maintaining the densified body at the devitrification temperature for a period of time effective to produce a .beta.'-SiAlON crystalline phase in the body having elemental or compound form Ce incorporated in the .beta.'-SiAlON crystalline phase. Further, a SiAlON ceramic body comprises: a) an amorphous phase; and b) a crystalline phase, the crystalline phase comprising .beta.'-SiAlON having lattice substituted elemental or compound form Ce.

Inventors:
 [1];  [1]
  1. (Idaho Falls, ID)
Issue Date:
Research Org.:
EG & G IDAHO INC
OSTI Identifier:
869333
Patent Number(s):
5316988
Assignee:
EG&G Idaho, Inc. (Idaho Falls, ID) INEEL
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
sialon; ceramic; compositions; methods; fabrication; method; fabricating; combining; quantities; ceo; produce; mixture; forming; desired; shape; heating; densification; temperature; 1550; degree; 1850; maintaining; period; time; effective; densify; cooling; densified; devitrification; 1200; 1400; beta; -sialon; crystalline; phase; elemental; compound; form; incorporated; comprises; amorphous; comprising; lattice; substituted; amorphous phase; phase comprising; ceramic composition; time effective; ceramic compositions; crystalline phase; sialon ceramic; compound form; combining quantities; /501/

Citation Formats

O'Brien, Michael H., and Park, Blair H. Sialon ceramic compositions and methods of fabrication. United States: N. p., 1994. Web.
O'Brien, Michael H., & Park, Blair H. Sialon ceramic compositions and methods of fabrication. United States.
O'Brien, Michael H., and Park, Blair H. Sat . "Sialon ceramic compositions and methods of fabrication". United States. https://www.osti.gov/servlets/purl/869333.
@article{osti_869333,
title = {Sialon ceramic compositions and methods of fabrication},
author = {O'Brien, Michael H. and Park, Blair H.},
abstractNote = {A method of fabricating a SiAlON ceramic body includes: a) combining quantities of Si.sub.3 N.sub.4, Al.sub.2 O.sub.3 and CeO.sub.2 to produce a mixture; b) forming the mixture into a desired body shape; c) heating the body to a densification temperature of from about 1550.degree. C. to about 1850.degree. C.; c) maintaining the body at the densification temperature for a period of time effective to densify the body; d) cooling the densified body to a devitrification temperature of from about 1200.degree. C. to about 1400.degree. C.; and e) maintaining the densified body at the devitrification temperature for a period of time effective to produce a .beta.'-SiAlON crystalline phase in the body having elemental or compound form Ce incorporated in the .beta.'-SiAlON crystalline phase. Further, a SiAlON ceramic body comprises: a) an amorphous phase; and b) a crystalline phase, the crystalline phase comprising .beta.'-SiAlON having lattice substituted elemental or compound form Ce.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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