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Sintering, properties and fabrication of Si3N4 + Y2O3 based ceramicsPure silicon nitride shows a remarkable resistance to sintering without the use of densification additives. The present investigation is concerned with results which show the effect of chemical content on sinterability, taking into account the composition, raw material impurities, and processing contaminants. Aspects of sintering are discussed along with strength characteristics, and oxidation relations. Attention is given to phase field I and II materials, phase field III and IV materials, tungsten carbide and oxidation at 600 C, and studies involving shape fabrication by injection molding. It was found that in sintering Si3N4 + Y2O3 an increase in the amount of Y2O3 and, in particular, the addition of Al2O3 enhances the fluidity of the liquid phase.
Document ID
19830067085
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Quackenbush, C. L.
(GTE Labs., Inc. Waltham, MA, United States)
Smith, J. T.
(GTE Labs., Inc. Waltham, MA, United States)
Neil, J. T.
(GTE Labs., Inc. Waltham, MA, United States)
French, K. W.
(GTE Laboratories, Inc. Waltham, MA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1983
Subject Category
Nonmetallic Materials
Accession Number
83A48303
Funding Number(s)
CONTRACT_GRANT: DEN3-17
Distribution Limits
Public
Copyright
Other

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