FINE-GRAINED SILICON-NITRIDE CERAMICS PREPARED FROM BETA-POWDER

Authors
MITOMO M HIROTSURU H SUEMATSU H NISHIMURA T
Citation
M. Mitomo et al., FINE-GRAINED SILICON-NITRIDE CERAMICS PREPARED FROM BETA-POWDER, Journal of the American Ceramic Society, 78(1), 1995, pp. 211-214
Citations number
19
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of the American Ceramic Society → ACNP
ISSN journal
00027820
Volume
78
Issue
1
Year of publication
1995
Pages
211 - 214
Database
ISI
SICI code
0002-7820(1995)78:1<211:FSCPFB>2.0.ZU;2-Z
Abstract
Fine beta-powder with an average particle size of 0.28 mu m was prepar ed by grinding and centrifugal sedimentation of submicrometer beta-pow der. Fine- and uniform-grained ceramics mere fabricated from the powde r by hot pressing. The average grain size of the ceramic was 0.21 mu m . It was shown that this kind of microstructure was desirable for the matrix of in situ composite. It was also shown that the ceramics could be superplastically deformed at a temperature as low as 1500 degrees C.