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Effect of the Filter Surface Chemistry on the Filtration of Aluminum

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Abstract

The influence of the filter surface chemistry of alumina skeletons on the filtration effect was tested with five different oxide coating materials (Al2O3, spinel, mullite, TiO2, and SiO2). All prepared filters were casted successfully under industrial conditions. The casted aluminum samples showed no contamination caused by the filters. The evaluation of the casted filters by means of SEM and EDX showed that the amount of inclusions in the area of the run in is larger than in the middle and the run out of the filter. The most non-metallic inclusions were found in the casted filters Al2O3+Al2O3 and Al2O3+spinel. The wetting experiments yielded for all tested materials a non-wetting behavior whereby Al2O3 and spinel showed higher wetting angle than mullite, TiO2, and SiO2.

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Acknowledgments

The authors would like to thank the German Research Foundation (DFG) for supporting these investigations in terms of the Collaborative Research Centre 920 “Multi-Functional Filters for Metal Melt Filtration—A Contribution towards Zero Defect Materials”, Subproject A02. The authors also would like to acknowledge the support of G. Schmidt. Finally, the authors would like to thank Metallgießerei an der Mulde, Germany for their support.

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Authors and Affiliations

  1. Institute of Ceramic, Glass and Construction Materials, Technische Universität Bergakademie Freiberg, Agricolastr. 17, 09599, Freiberg, Germany

    Claudia Voigt (Research Associate), Christos G. Aneziris (Professor) & Jana Hubálková (Research Associate)

  2. Institute of Nonferrous Metallurgy and Purest Materials, Technische Universität Bergakademie Freiberg, Leipziger Straße 34, 09599, Freiberg, Germany

    Beate Fankhänel (Research Associate) & Michael Stelter (Professor)

  3. Institute of Foundry Technology, Technische Universität Bergakademie Freiberg, Bernhard-von-Cotta-Straße 4, 09599, Freiberg, Germany

    Eva Jäckel (Research Associate)

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  1. Claudia Voigt
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  2. Beate Fankhänel
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  3. Eva Jäckel
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  4. Christos G. Aneziris
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  5. Michael Stelter
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  6. Jana Hubálková
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Correspondence to Claudia Voigt.

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Manuscript submitted June 26, 2014.

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Voigt, C., Fankhänel, B., Jäckel, E. et al. Effect of the Filter Surface Chemistry on the Filtration of Aluminum. Metall Mater Trans B 46, 1066–1072 (2015). https://doi.org/10.1007/s11663-014-0232-7

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  • DOI: https://doi.org/10.1007/s11663-014-0232-7

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