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Consolidation of silicon nitride without additivesThe use of ceramics for gas turbine engine construction might make it possible to increase engine efficiency by raising operational temperatures to values beyond those which can be tolerated by metallic alloys. The most promising ceramics being investigated in this connection are Si3N4 and SiC. A description is presented of a study which had the objective to produce dense Si3N4. The two most common methods of consolidating Si3N4 currently being used include hot pressing and reaction sintering. The feasibility was explored of producing a sound, dense Si3N4 body without additives by means of conventional gas hot isostatic pressing techniques and an uncommon hydraulic hot isostatic pressing technique. It was found that Si3N4 can be densified without additions to a density which exceeds 95% of the theoretical value
Document ID
19780040986
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sikora, P. F.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Yeh, H. C.
(NASA Lewis Research Center; Cleveland State University Cleveland, Ohio, United States)
Date Acquired
August 9, 2013
Publication Date
October 1, 1976
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: Fall Meeting
Location: San Francisco, CA
Start Date: October 31, 1976
End Date: November 3, 1976
Sponsors: American Ceramic Society
Accession Number
78A24895
Distribution Limits
Public
Copyright
Other

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