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JOM

, Volume 68, Issue 2, pp 692–700 | Cite as

Microstructural Evolution of Chloride-Cleaned Silicon Carbide Aluminum Composites

  • S. O. Adeosun
  • E. I. Akpan
  • O. P. Gbenebor
  • S. A. Balogun
Article
  • 107 Downloads

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.

Keywords

Filler Particle Molten Aluminum Solidification Mechanism AlFeSi Cast Composite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Minerals, Metals & Materials Society 2015

Authors and Affiliations

  1. 1.Department of Metallurgical and Materials EngineeringUniversity of LagosLagosNigeria
  2. 2.Department of Materials and Production EngineeringAmbrose Alli UniversityEkpomaNigeria
  3. 3.Department of Mechanical and Biomedical EngineeringBells University of TechnologyOtaNigeria

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