Dissemination of IT for the Promotion of Materials Science (DoITPoMS)

DoITPoMS Micrograph Library Full Record for Micrograph 623

Full Record for Micrograph 623

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Micrograph no
623
Brief description
Space-filling fire-resistant composite Barrikade (R)
Keywords
Barrikade, composite material Link to MATTER Glossary entry for composite material, edible, filler Link to MATTER Glossary entry for filler, fire resistant, thermal, vermiculite, ZnO
Categories
Composite
System
Barrikade
Composition
Expanded vermiculite, cured in ZnO and mixed with binder
Standard codes
Reaction
The ZnO cure makes the system water-resistant
Processing
Exfoliated vermiculite particles are first mixed with a binder and ZnO, then cured at 100 degrees C. The treatment is then repeated with the particles pressed into a mould and dried.
Applications
Barrikade (r) is a light-weight, inexpensive, edible, space-filling composite which is water resistant. It also has moderate thermal conductivity and is fire-resistant, making it a suitable fire-retarding material.
Sample preparation
A sample has been mounted in resin and cross-sectioned.
Technique
Photography (no microscope)
Length bar
10 mm
Further information
The concertina-like structure of the exfoliated vermiculite particles is clear. This configuration is set by the binder during the initial cure. This is then followed by a moulding operation and secondary, inter-particulate binding.
Contributor
R Goodall
Organisation
Department of Materials Science and Metallurgy, University of Cambridge
Date
03/10/02
Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales
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