NDLI: Direct formulation of nanocrystalline silicon carbide/nitride solid ceramics

Content Provider	Springer Nature Link
Author	Keller, Teddy M. Laskoski, Matthew Qadri, Syed B. Dyatkin, Boris Saab, Andrew P. Kolel Veetil, Maj
Copyright Year	2017
Abstract	We developed a new in situ reaction method to synthesize SiC and Si$_{3}$N$_{4}$ ceramic solids from meltable precursor compositions into shaped ceramic composites with nanocrystalline grains. The process uses Si powder and 1,2,4,5-tetrakis(phenylethynyl)benzene, which readily react above 1400 °C to form the SiC and Si$_{3}$N$_{4}$ crystallites in the presence of argon and nitrogen, respectively. X-ray diffraction analysis, Raman spectroscopy and density measurements indicated the formation of near stoichiometric SiC and Si$_{3}$N$_{4}$ within the shaped solid. Further characterization of electrical conductivity and oxidative stability of the prepared ceramics analyzed the influence of nanoscale features on intrinsic properties of resulting composites. The hardness and elastic modulus values for the synthesized SiC determined by nanoindentation varied in the range of 25–46 GPa and 300–440 GPa.
Starting Page	9294
Ending Page	9307
Page Count	14
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	52
Issue Number	16
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2017-05-11
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Materials Science Characterization and Evaluation of Materials Polymer Sciences Continuum Mechanics and Mechanics of Materials Crystallography and Scattering Methods Classical Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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