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Microstructural Evolution of Chloride-Cleaned Silicon Carbide Aluminum Composites

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An Erratum to this article was published on 18 December 2015

Abstract

This study examines the synergy between reinforcement surface modifications on the evolution of microstructures of AA6011-silicon carbide particle (SiCp) composites in multidirectional solidification. Silicon carbide particles (SiCp) were cleaned with ammonium chloride, tin(II) chloride, sodium chloride, and palladium(II) chloride and used as reinforcement to cast AA6011-SiCp composites by applying the stir casting method. A scanning electron microscope and x-ray diffractometer were used to investigate the morphology and phases present, respectively, in the composite material. Results show that wetting agents were effective as they inhibited the formation of Al4C3 in all modified composites. The modified SiCp was found to have varying effects on the morphology, dendrite arm size and direction, size and configuration of AlFeSi, and the amount of eutectic silicon depending on the concentration of the reagent and cleaning time. The highest effect was shown by the use of 40 g/L of tin(II) chloride. The composites had short dendritic arms, good interfacial interaction, and only a few crystals of AlFeSi.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, University of Lagos, Lagos, Nigeria

    S. O. Adeosun & O. P. Gbenebor

  2. Department of Materials and Production Engineering, Ambrose Alli University, Ekpoma, Nigeria

    E. I. Akpan

  3. Department of Mechanical and Biomedical Engineering, Bells University of Technology, Ota, Nigeria

    S. A. Balogun

Authors
  1. S. O. Adeosun
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  2. E. I. Akpan
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  3. O. P. Gbenebor
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  4. S. A. Balogun
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Corresponding author

Correspondence to E. I. Akpan.

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Adeosun, S.O., Akpan, E.I., Gbenebor, O.P. et al. Microstructural Evolution of Chloride-Cleaned Silicon Carbide Aluminum Composites. JOM 68, 692–700 (2016). https://doi.org/10.1007/s11837-015-1717-9

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  • DOI: https://doi.org/10.1007/s11837-015-1717-9

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