DoITPoMS

Full Record for Micrograph 185

Link to full size image of micrograph 185
[670 KB]

View micrograph
.. in new window

View micrograph and record
.. in new window


You can also view and download the micrographs at CORE-Materials and also on Flickr
Micrograph no
185
Brief description
Silicon Nitride-bonded Silicon Carbide
Keywords
ceramic Link to MATTER Glossary entry for 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 1400ÂșC 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-Non-Commercial-Share Alike 2.0 UK: England & Wales
Related micrographs