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Full Record for Micrograph 606

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Micrograph no
606
Brief description
Extruded Saffil-containing metal matrix composite
Keywords
alignment, composite material Link to MATTER Glossary entry for composite material, extrusion Link to MATTER Glossary entry for extrusion, MMC, particle, reinforcement Link to MATTER Glossary entry for reinforcement, Saffil
Categories
Composite
System
Al
Composition
Commercial purity (99.5%)
Standard codes
Reaction
N/A
Processing
Commercial purity (99.5%) aluminium has been atomised, thoroughly mixed with alumina reinforcement fibres and then extruded.
Applications
Metal matrix composites (MMCs) offer high specific stiffness which can be retained to high temperatures. This makes them suitable for applications in the aerospace industry. They also offer controlled (or zero) thermal expansion coefficients, good wear resistance and good impact properties.
Sample preparation
The sample has been oxidised to provide colour contrast for different grain orientations.
Technique
Reflected light microscopy, polarised
Length bar
40 μm
Further information
Commercial purity aluminium has atomised, mixed with short, 3 micron 'Saffil' alumina fibres, ball milled, tumbled, cold compacted (20MPa) and then extruded. The fibres are well distributed and generally lie parallel to the extrusion direction (horizontal).
Contributor
Prof T W Clyne
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