Liquid phase sintering of silicon carbide
Abstract
Liquid phase sintering is used to densify silicon carbide based ceramics using a compound comprising a rare earth oxide and aluminum oxide to form liquids at temperatures in excess of 1600.degree. C. The resulting sintered ceramic body has a density greater than 95% of its theoretical density and hardness in excess of 23 GPa. Boron and carbon are not needed to promote densification and silicon carbide powder with an average particle size of greater than one micron can be densified via the liquid phase process. The sintered ceramic bodies made by the present invention are fine grained and have secondary phases resulting from the liquid phase.
- Inventors:
-
- Bountiful, UT
- Salt Lake City, UT
- Issue Date:
- Research Org.:
- Cerametic Inc
- OSTI Identifier:
- 866956
- Patent Number(s):
- 4829027
- Assignee:
- Ceramatec, Inc. (Salt Lake City, UT)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
- DOE Contract Number:
- AC03-84ER80191
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- liquid; phase; sintering; silicon; carbide; densify; based; ceramics; compound; comprising; rare; earth; oxide; aluminum; form; liquids; temperatures; excess; 1600; degree; resulting; sintered; ceramic; density; 95; theoretical; hardness; 23; gpa; boron; carbon; promote; densification; powder; average; particle; size; micron; densified; via; process; bodies; fine; grained; secondary; phases; based ceramics; phase sintering; fine grained; theoretical density; earth oxide; carbide powder; aluminum oxide; liquid phase; rare earth; silicon carbide; particle size; sintered ceramic; compound comprising; ceramic bodies; average particle; phase process; fine grain; based ceramic; /501/264/
Citation Formats
Cutler, Raymond A, Virkar, Anil V, and Hurford, Andrew C. Liquid phase sintering of silicon carbide. United States: N. p., 1989.
Web.
Cutler, Raymond A, Virkar, Anil V, & Hurford, Andrew C. Liquid phase sintering of silicon carbide. United States.
Cutler, Raymond A, Virkar, Anil V, and Hurford, Andrew C. Sun .
"Liquid phase sintering of silicon carbide". United States. https://www.osti.gov/servlets/purl/866956.
@article{osti_866956,
title = {Liquid phase sintering of silicon carbide},
author = {Cutler, Raymond A and Virkar, Anil V and Hurford, Andrew C},
abstractNote = {Liquid phase sintering is used to densify silicon carbide based ceramics using a compound comprising a rare earth oxide and aluminum oxide to form liquids at temperatures in excess of 1600.degree. C. The resulting sintered ceramic body has a density greater than 95% of its theoretical density and hardness in excess of 23 GPa. Boron and carbon are not needed to promote densification and silicon carbide powder with an average particle size of greater than one micron can be densified via the liquid phase process. The sintered ceramic bodies made by the present invention are fine grained and have secondary phases resulting from the liquid phase.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}