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Si3N4-Based Ceramic With Greater Hot StrengthZyttrite-doped material outperforms MgO-doped material above 1,200 degrees C. New ceramic material produced by addition of 10 weight percent zyttrite (yttria-stabilized zirconia) to (silicon nitride) offers significantly-improved high-temperature properties (those of MgO-doped Si3N4 ceramic). Work also showed that controlled Si3N4 powder with 10 weight percent zyttrite, significant improvement in room-temperature strength achieved. Variety of high-temperature structural applications are silicon nitride and silicon carbide. Potential for use in aircraft and automobile engines and in electric-power generating systems. Improved properties strongly suggest that the 10-weight percent zyttrite/Si3N4 material has strong potential for high-temperature applications.
Document ID
19860000128
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Dutta, S.
Buzek, B.
Date Acquired
August 12, 2013
Publication Date
May 1, 1986
Publication Information
Publication: NASA Tech Briefs
Volume: 10
Issue: 2
ISSN: 0145-319X
Subject Category
Materials
Report/Patent Number
LEW-14193
Accession Number
86B10128
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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