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Full Record for Micrograph 423
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- Micrograph no
- 423
- Brief description
- Commercial brass, ~30% Zn, displaying dendritic solidification
- Keywords
- alloy
, brass , copper, dendrite , metal, zinc - Categories
- Metal or alloy
- System
- Cu-Zn
- Composition
- Cu 70, Zn 30 (approx), Pb 1.3, Sn 0.5-1.0 (wt%)
- Standard codes
- Reaction
- Processing
- Chill cast
- Applications
- Sample preparation
- Ammonium persulphate
- Technique
- Reflected light microscopy
- Length bar
- 400 μm
- Further information
- An 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- Related micrographs
- Micrograph 420: Commercial brass, ~30% Zn, displaying dendritic solidification (800 μm)
- Micrograph 421: Commercial brass, ~30% Zn, displaying dendritic solidification (400 μm)
- Micrograph 422: Commercial brass, ~30% Zn, displaying dendritic solidification (800 μm)
- Micrograph 424: Commercial brass, ~30% Zn, displaying dendritic solidification (200 μm)