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Combustion for the Synthesis of β-SiC and Diamond/SiC Composite

Published online by Cambridge University Press:  22 February 2011

Rohini Raghunathan ,
Rina Chowdhury  and
Jagdish Narayan
Rohini Raghunathan
Affiliation:
North Carolina State University, Department of Materials Science and Engineering, Raleigh, NC 27695-7916
Rina Chowdhury
Affiliation:
North Carolina State University, Department of Materials Science and Engineering, Raleigh, NC 27695-7916
Jagdish Narayan
Affiliation:
North Carolina State University, Department of Materials Science and Engineering, Raleigh, NC 27695-7916
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Abstract

Cubic β-SiC was processed under conditions of self-propagating high-temperature synthesis, based on the exothermic reaction between elemental Si and C powders. The set up for the synthesis of SiC using a mixture of Si and C is described. X-Ray and Raman spectroscopy studies were performed to characterize the quality of the β-SiC produced using the new set up. Scanning Electron Microscopy and Transmission Electron Microscopy studies were also carried out to study the mechanism of the formation of β-SiC from the elemental powders. The density of the compact and grain size of the graphite was found to be critical in the formation of the SiC. Diamond seeds were also implanted on the SiC pellet while compaction and this implanted diamond provided the necessary seed for the growth of a thick diamond film. The adhesion of the film is good because of its growth from the implanted diamond. Diamond films were grown on SiC using HFCVD. The quality and the adhesion of the diamond films on SiC were studied using SEM.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 327: Symposium N – Covalent Ceramics II: Non-Oxides , 1993 , 221
Copyright
Copyright © Materials Research Society 1994

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