Kumar , Rajeev and Kumar, Anil and Kaur , Mandeep and Kumar, Sandeep and Sengupta, P. R. and Raman, V. and Bhatia, Gopal (2009) Influence of coal tar pitch coating on the properties of micro and nano SiC incorporated carbon–ceramic composites. Journal of Materials Science Letters , 44 (17). pp. 4633-4638. ISSN 0261-8028

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Abstract

Carbon-micro or nano silicon carbide–boron carbide (C-micro or nanoSiC–B4C) composites were prepared by heating the mixtures of green coke and carbon black as carbon source, boron carbide and silicon at temperature of 1,400 °C. Green coke reacts with silicon to give micron sized silicon carbide while the reaction between silicon and carbon black gives nano silicon carbide in the resulting carbon–ceramic composites. The green coke was coated with a suitable coal tar pitch material and used to develop carbon-(micro or nano) silicon carbide–boron carbide composites in a separate lot. The composites were characterized for various properties including oxidation resistance. It was observed that both types of composites made from uncoated as well as pitch-coated green coke exhibited good oxidation resistance at 800–1,200 °C. The density and bending strength of composites developed with pitch-coated green coke improved significantly due to the enhanced binding of the constituents by the pitch.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	04 Sep 2012 06:43
Last Modified:	04 Sep 2012 06:43
URI:	http://npl.csircentral.net/id/eprint/534

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