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Micrograph 554 and full record

Link to image file for micrograph 554
Micrograph no
554
Brief description
Silicon carbide
Keywords
ceramic Link to MATTER Glossary entry for ceramic, silicon carbide
Categories
Ceramic
System
SiC
Composition
Not specified
Standard codes
Reaction
SiO<sub>2</sub> + 3C = SiC + 2CO
Processing
SiC is usually produced using the Acheson process, which uses petroleum coke and silica as raw materials
Applications
Used as an abrasive and refractory material.
Sample preparation
As received
Technique
Photography (no microscope)
Length bar
10 mm
Further information
Individual hexagonal plate-shaped grains of silicon carbide are visible. The shape of these plates indicates that the silicon carbide is a-SiC, which consists of a mixture of various hexagonal and rhombohedral polytypes of silicon carbide, principally 6H, 15R and 4H in the Ramsdell notation.
Contributor
Dr K M Knowles
Organisation
Department of Materials Science and Metallurgy, University of Cambridge
Date
01/10/02
Licence for re-use
Attribution-NonCommercial-ShareAlike 4.0 International

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