DoITPoMS

Full Record for Micrograph 5

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Micrograph no
5
Brief description
Al 64, Cu 36 (wt%), hypereutectic 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, hypereutectic Link to MATTER Glossary entry for hypereutectic, metal
Categories
Metal or alloy
System
Al-Cu   Link to phase diagram
Composition
Al 64, Cu 36 (wt%)
Standard codes
Reaction
Processing
Sand cast
Applications
Sample preparation
Etched in sodium hydroxide solution
Technique
Reflected light microscopy
Length bar
400 μm
Further information
When the composition of the alloy exceeds the eutectic, as in this hypereutectic sample, the initial dendrites that form are of CuAl2. The remaining liquid transforms to the eutectic at the eutectic temperature.
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