CORE-Materials
Extruded Saffil-containing metal matrix composite
DoITPoMS, University of Cambridge
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).
System
Al
Composition
Commercial purity (99.5%)
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
Contributor
Prof T W Clyne
Organisation
Department of Materials Science and Metallurgy, University of Cambridge
Extruded Saffil-containing metal matrix composite
DoITPoMS, University of Cambridge
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).
System
Al
Composition
Commercial purity (99.5%)
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
Contributor
Prof T W Clyne
Organisation
Department of Materials Science and Metallurgy, University of Cambridge