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

DoITPoMS Micrograph Library Micrograph 437 and full record

Micrograph 437 and full record

Link to image file for micrograph 437
Micrograph no
437
Brief description
Cu, Sn 20 (wt%) bronze, exhibiting dendritic solidification
Keywords
alloy Link to MATTER Glossary entry for alloy, bronze Link to MATTER Glossary entry for bronze, copper, dendrite Link to MATTER Glossary entry for dendrite, metal, tin
Categories
Metal or alloy
System
Cu-Sn   Link to phase diagram
Composition
Cu 80, Sn 20 (wt%)
Standard codes
Reaction
Processing
Cast, annealed 530 ºC, waterquenched
Applications
Sample preparation
Ferric chloride
Technique
Reflected light microscopy
Length bar
800 μm
Further information
A good example of dendritic solidification, which occurs when the solidification front becomes unstable with respect to small perturbations. This results in the growth of the perturbations, producing dendrites (from the Greek for tree). The variation in colour across the micrograph indicates that the cooling was sufficiently rapid to prevent solid state diffusion and hence a concentration variation. This phenomena is known as coring.
Contributor
Dr R F Cochrane
Organisation
Department of Materials, University of Leeds
Date
04/09/02
Licence for re-use
Attribution-NonCommercial-ShareAlike 4.0 International
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