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-Non-Commercial-Share Alike 2.0 UK: England & Wales