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

DoITPoMS Micrograph Library Full Record for Micrograph 702
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Full Record for Micrograph 702

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Micrograph no
702
Brief description
Cu-10.5 wt% P
Keywords
alloy Link to MATTER Glossary entry for alloy, bronze Link to MATTER Glossary entry for bronze, copper, copper phosphide, dendrite Link to MATTER Glossary entry for dendrite, hypoeutectic Link to MATTER Glossary entry for hypoeutectic, metal, phosphorus Link to MATTER Glossary entry for phosphorus, porosity Link to MATTER Glossary entry for porosity
Categories
Metal or alloy
System
Cu-P   Link to phase diagram
Composition
Cu 89.5, P 10.5 (wt%)
Standard codes
Reaction
Processing
Applications
Sample preparation
Technique
Reflected light microscopy
Length bar
100 μm
Further information
This is an example of a hypereutectic alloy. On slow cooling the liquid first solidified as copper phosphide dendrites at approximately 850ºC. The remaining liquid solidified as a eutectic at 714ºC. The copper phosphide is brittle and has cracked due to shrinkage stresses. Note that because of its narrow composition range, there is no coring in the dendrites. This sample also contains some porosity.
Contributor
Dr J Marrow
Organisation
Department of Materials Science, University of Manchester and UMIST
Date
07/11/02
Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales
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