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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 1,550 C to about 1,850 C; (d) maintaining the body at the densification temperature for a period of time effective to densify the body; (e) cooling the densified body to a devitrification temperature of from about 1,200 C to about 1,400 C; and (f) maintaining the densified body at the devitrification temperature for a period of time effective to produce a [beta][prime]-SiAlON crystalline phase in the body having elemental or compound form Ce incorporated in the [beta][prime]-SiAlON crystalline phase. Further, a SiAlON ceramic body comprises: (a) an amorphous phase; and (b) a crystalline phase, the crystalline phase comprising [beta][prime]-SiAlON having lattice substituted elemental or compound form Ce.

Inventors:
;
Issue Date:
OSTI Identifier:
7037464
Patent Number(s):
5316988 A
Application Number:
PPN: US 8-100888
Assignee:
EG G Idaho, Inc., Idaho Falls, ID (United States) PTO; EDB-94-101815
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Patent
Resource Relation:
Patent File Date: 2 Aug 1993
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; FABRICATION; SILICON NITRIDES; CERIUM OXIDES; CHEMICAL COMPOSITION; CRYSTAL STRUCTURE; DENSITY; MIXTURES; PHASE STUDIES; ALUMINIUM COMPOUNDS; CERIUM COMPOUNDS; CHALCOGENIDES; DISPERSIONS; NITRIDES; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PNICTIDES; RARE EARTH COMPOUNDS; SILICON COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication

Citation Formats

O'Brien, M.H., and Park, B.H. SiAlON ceramic compositions and methods of fabrication. United States: N. p., 1994. Web.
O'Brien, M.H., & Park, B.H. SiAlON ceramic compositions and methods of fabrication. United States.
O'Brien, M.H., and Park, B.H. Tue . "SiAlON ceramic compositions and methods of fabrication". United States.
@article{osti_7037464,
title = {SiAlON ceramic compositions and methods of fabrication},
author = {O'Brien, M.H. and Park, B.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 1,550 C to about 1,850 C; (d) maintaining the body at the densification temperature for a period of time effective to densify the body; (e) cooling the densified body to a devitrification temperature of from about 1,200 C to about 1,400 C; and (f) maintaining the densified body at the devitrification temperature for a period of time effective to produce a [beta][prime]-SiAlON crystalline phase in the body having elemental or compound form Ce incorporated in the [beta][prime]-SiAlON crystalline phase. Further, a SiAlON ceramic body comprises: (a) an amorphous phase; and (b) a crystalline phase, the crystalline phase comprising [beta][prime]-SiAlON having lattice substituted elemental or compound form Ce.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {5}
}