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Title: Silicon nitride/silicon carbide composite densified materials prepared using composite powders

Abstract

Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.

Inventors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Midland, MI
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
871028
Patent Number(s):
5643843
Application Number:
08/678199
Assignee:
Dow Chemical Company (Midland, MI)
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
DOE Contract Number:  
86X-SK761C
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
silicon; nitride; carbide; composite; densified; materials; prepared; powders; prepare; nitride-silicon; carbothermal; reduction; crystalline; silica; powder; carbon; optionally; portion; mean; diameter; 700; nanometers; contains; nitrogen; sintered; ceramic; bodies; self-reinforced; silica powder; carbide composite; nitride powder; silicon nitride; silicon carbide; crystalline silicon; sintered ceramic; carbon powder; composite powders; ceramic bodies; nitride ceramic; carbide portion; carbothermal reduction; crystalline silica; materials prepared; silicon nitride-; silicon nitride-silicon; nitride-silicon carbide; contains nitrogen; -silicon carbide; prepare silicon; /501/

Citation Formats

Dunmead, Stephen D, Weimer, Alan W, Carroll, Daniel F, Eisman, Glenn A, Cochran, Gene A, Susnitzky, David W, Beaman, Donald R, and Nilsen, Kevin J. Silicon nitride/silicon carbide composite densified materials prepared using composite powders. United States: N. p., 1997. Web.
Dunmead, Stephen D, Weimer, Alan W, Carroll, Daniel F, Eisman, Glenn A, Cochran, Gene A, Susnitzky, David W, Beaman, Donald R, & Nilsen, Kevin J. Silicon nitride/silicon carbide composite densified materials prepared using composite powders. United States.
Dunmead, Stephen D, Weimer, Alan W, Carroll, Daniel F, Eisman, Glenn A, Cochran, Gene A, Susnitzky, David W, Beaman, Donald R, and Nilsen, Kevin J. Tue . "Silicon nitride/silicon carbide composite densified materials prepared using composite powders". United States. https://www.osti.gov/servlets/purl/871028.
@article{osti_871028,
title = {Silicon nitride/silicon carbide composite densified materials prepared using composite powders},
author = {Dunmead, Stephen D and Weimer, Alan W and Carroll, Daniel F and Eisman, Glenn A and Cochran, Gene A and Susnitzky, David W and Beaman, Donald R and Nilsen, Kevin J},
abstractNote = {Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {7}
}

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Works referenced in this record:

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Influence of Starting Powder Characteristics on Mechanical Properties of SiC-particle/Si3N4 Composites
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Synthesis of silicon nitride by carbothermal reduction and nitriding of silica: Control of kinetics and morphology
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