Full Record for Micrograph 554
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- Micrograph no
- 554
- Brief description
- Silicon carbide
- Keywords
- 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