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Experimental Study of Radial Segregation Caused by Weak Convection
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik, fysik och matematik.ORCID-id: 0000-0002-3622-4247
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2005 (Engelska)Ingår i: Microgravity, science and technology, ISSN 0938-0108, E-ISSN 1875-0494, Vol. 15, nr 1, s. 35-39Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Under conditions of weak convection in the liquid during metal solidification and crystal growth, large chemical inhomogeneities can occur due to insufficient 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 quantitatively from analysis of axial segregation profiles. As expected a significantly stronger radial segregation has occurred in the space grown material compared to ground based reference experiments. It was also found that there was a shift of the position of maximum concentration when the flow was increased. Unexpected axial solute maxima were also revealed in the space samples. A comparison was made to numerical simulations, and good correlations were found to first order effects.

Ort, förlag, år, upplaga, sidor
2005. Vol. 15, nr 1, s. 35-39
Nyckelord [en]
Crystal growth, Microgravity, Convection, Segregation
Nationell ämneskategori
Materialteknik
Identifikatorer
URN: urn:nbn:se:miun:diva-1540DOI: 10.1007/BF02945942Lokalt ID: 442OAI: oai:DiVA.org:miun-1540DiVA, id: diva2:26572
Tillgänglig från: 2008-09-30 Skapad: 2008-09-30 Senast uppdaterad: 2017-12-13Bibliografiskt granskad

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Carlberg, Torbjörn

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