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:
-
- 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)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
- 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 = {Sat Jan 01 00:00:00 EST 1994},
month = {Sat Jan 01 00:00:00 EST 1994}
}