DoITPoMS

Full Record for Micrograph 2

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Micrograph no
2
Brief description
Al 75, Cu 25 (wt%), hypoeutectic alloy
Keywords
alloy Link to MATTER Glossary entry for alloy, aluminium Link to MATTER Glossary entry for aluminium, copper, dendrite Link to MATTER Glossary entry for dendrite, hypoeutectic Link to MATTER Glossary entry for hypoeutectic, lamella Link to MATTER Glossary entry for lamella, metal
Categories
Metal or alloy
System
Al-Cu   Link to phase diagram
Composition
Al 75, Cu 25 (wt%)
Standard codes
Reaction
Processing
Sand cast
Applications
Sample preparation
Etched in sodium hydroxide solution
Technique
Scanning electron microscopy (SEM)
Length bar
30 μm
Further information
This is a secondary electron micrograph of the hypereuctectic alloy showing the Al dendrites and the Al-CuAl2 eutectic in greater detail. It is clear that the lamellar eutectic has been significantly distorted by the presence of the primary Al dendrites. Around the dendrites there is a layer of CuAl2.
Contributor
Prof T W Clyne
Organisation
Department of Materials Science and Metallurgy, University of Cambridge
Date
25/10/01
Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales
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