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

DoITPoMS Micrograph Library Full Record for Micrograph 3
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Full Record for Micrograph 3

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Micrograph no
3
Brief description
Al 67, Cu 33 (wt%), eutectic alloy
Keywords
alloy Link to MATTER Glossary entry for alloy, aluminium Link to MATTER Glossary entry for aluminium, copper, eutectic Link to MATTER Glossary entry for eutectic, lamella Link to MATTER Glossary entry for lamella, metal
Categories
Metal or alloy
System
Al-Cu   Link to phase diagram
Composition
Al 67, Cu 33 (wt%)
Standard codes
Reaction
Processing
Unidirectionally solidified
Applications
Sample preparation
Etched in sodium hydroxide solution
Technique
Reflected light microscopy
Length bar
80 μm
Further information
This alloy is of the eutectic composition and has solidified with a lamellae eutectic structure. The Al and q phases form co-operatively. The eutectic lamellae grows in the principal direction of heat flow; the lamellae structure is stabilised by the high temperature gradient. In the lower part of the micrograph the lamellae structure breaks down.
Contributor
Prof T W Clyne
Organisation
Department of Materials Science and Metallurgy, University of Cambridge
Date
25/10/01
Licence for re-use
Attribution-NonCommercial-ShareAlike 4.0 International
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