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Radial Segregation during Microgravity Experiments: Presented at The International Conference on Advances in Solidification Processing, Stockholm, Sweden, June 2005
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.ORCID iD: 0000-0002-3622-4247
2005 (English)Conference paper, (Other scientific)
Abstract [en]

Under conditions of weak convection in the liquid during metal solidification and crystal growth, large chemical inhomogeneities can occur due to insuffi-cient mixing of the melt. In this project a series of experiments with increasing melt flow, driven by thermo-capillary forces, have been performed in a Get Away Special flight. The level of convection was evaluated quanti-tatively from analysis of axial segregation profiles. As expected a significantly stronger radial segre-gation has occurred in the space grown mate-rial compared to ground based reference experiments. It was also found that there was a shift of the position of max-imum concentration when the flow was in-creased. Unexpected axial solute maxima were also revealed in the space samples. A comparison was made to numerical simulations, and good correla-tions were found to first order effects.

Place, publisher, year, edition, pages
2005.
Keyword [en]
Microgravity, radial segregation, weak convection
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:miun:diva-4060Local ID: 3382OAI: oai:DiVA.org:miun-4060DiVA: diva2:29092
Available from: 2008-09-30 Created: 2008-09-30Bibliographically approved

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Carlberg, Torbjörn
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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