Low-temperature production of porous silicon-carbide ceramics by the self-binding method

Low-temperature production of porous silicon-carbide ceramics by the self-binding method Polycarbosilane (PCS) heat-treated (preheated) at low temperatures (500 – 600°C) was chosen as the raw material for the production of porous SiC ceramics. The PCS was ground in a ball mill, shaped by slip casting, and sintered at 1000°C. Due to the semi-organic structure of the preheated PCS, the milled powders can be shaped and then sintered at 1000°C without the use of other binders; this made possible to create the above-mentioned porous SiC ceramics. The pore size, open porosity, and ultimate flexural strength of the SiC ceramics that were obtained were studied. It was found that an increase in the temperature at which the PCS is heat-treated impedes its shaping and reduces the open porosity and ultimate flexural strength of the resulting SiC ceramics. Information is also presented from a study of the fracture surface of the porous SiC ceramic. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Low-temperature production of porous silicon-carbide ceramics by the self-binding method

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Publisher
Springer US
Copyright
Copyright © 2012 by Springer Science+Business Media New York
Subject
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/s11148-012-9485-3
Publisher site
See Article on Publisher Site

Abstract

Polycarbosilane (PCS) heat-treated (preheated) at low temperatures (500 – 600°C) was chosen as the raw material for the production of porous SiC ceramics. The PCS was ground in a ball mill, shaped by slip casting, and sintered at 1000°C. Due to the semi-organic structure of the preheated PCS, the milled powders can be shaped and then sintered at 1000°C without the use of other binders; this made possible to create the above-mentioned porous SiC ceramics. The pore size, open porosity, and ultimate flexural strength of the SiC ceramics that were obtained were studied. It was found that an increase in the temperature at which the PCS is heat-treated impedes its shaping and reduces the open porosity and ultimate flexural strength of the resulting SiC ceramics. Information is also presented from a study of the fracture surface of the porous SiC ceramic.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Nov 13, 2012

References

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