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Full Record for Micrograph 185
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- Micrograph no
- 185
- Brief description
- Silicon Nitride-bonded Silicon Carbide
- Keywords
- ceramic
, silicon carbide, silicon nitride - Categories
- Ceramic
- System
- Silicon nitride-bonded silicon carbide
- Composition
- Particles of SiC in a reaction-bonded Si3N4 matrix
- Standard codes
- Reaction
- Processing
- SiC grit mixed with Si powder (and binders) is cast/pressed/injection moulded, and then fired in a nitrous atmosphere at about 1400ºC for several hours to allow the Si to react, forming a reaction-bonded Si3N4 skeleton, which holds the carbide particles.
- Applications
- Immersion tube heaters, bricks (for use in furnaces, kilns etc), cast refractories.
- Sample preparation
- Polished but unetched
- Technique
- Reflected light microscopy
- Length bar
- 250 μm
- Further information
- Silicon Nitride bonded Silicon Carbide is characterized by excellent wear properties, good resistance to high temperatures, good impact resistance, an ability to be easily cast, and good corrosion resistance.
- Contributor
- Dr K M Knowles
- Organisation
- Department of Materials Science and Metallurgy, University of Cambridge
- Date
- 09/08/02
- Licence for re-use
Attribution-NonCommercial-ShareAlike 4.0 International- Related micrographs