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An Experimental Investigation of Effects of Fluxes (Na3AlF6 and K2TiF6), Element Alloys (Mg), and Composite Powders ((Al + TiC)CP and (Al + B4C)CP) on Distribution of Particles and Phases in Al-B4C and Al-TiC Composites

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Abstract

The wettability, incorporation, and gravity segregation of TiC and B4C particles into molten aluminum are important problems in the production of Al-TiC and Al-B4C composites by the casting techniques. In order to solve these problems, different methods consisting of adding the Na3AlF6 and K2TiF6 fluxes and Mg (as the alloying element) into the molten aluminum and injection of the (Al + TiC)CP and (Al + B4C)CP composite powders instead of B4C and TiC particles are evaluated. In this work, the conditions of sample preparation, such as particle addition temperature, stirring speed, and stirring time, are determined after many studies and tests. Microstructural characterizations of samples are investigated by scanning electron microscopy equipped with energy dispersive spectroscopy (EDS) and X-ray diffractometry. The results show better distribution and incorporation of TiCp and B4Cp in aluminum matrix when the fluxes are used, as well as EDS analysis of the interface between the matrix and reinforcement-strengthened formation of the different phases such as Al4C3 in the Al-TiC composites and Al3BC, TiB2 in the Al-B4C composites.

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  1. PHILIPS is a trademark of scanning electron microscopy.

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Authors and Affiliations

  1. Department of Materials Engineering, Isfahan University of Technology, P. O. Box 84156-83111, Isfahan, Iran

    Younes Mazaheri, Rahmatollah Emadi & Mahmood Meratian

  2. Department of Materials Science and Engineering, Engineering School, Shiraz University, P. O. Box 71348-15939, Shiraz, Iran

    Mehdi Karimi Zarchi

Authors
  1. Younes Mazaheri
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  2. Rahmatollah Emadi
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  3. Mahmood Meratian
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  4. Mehdi Karimi Zarchi
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Correspondence to Younes Mazaheri.

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Manuscript submitted August 22, 2016.

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Mazaheri, Y., Emadi, R., Meratian, M. et al. An Experimental Investigation of Effects of Fluxes (Na3AlF6 and K2TiF6), Element Alloys (Mg), and Composite Powders ((Al + TiC)CP and (Al + B4C)CP) on Distribution of Particles and Phases in Al-B4C and Al-TiC Composites. Metall Mater Trans B 48, 1279–1291 (2017). https://doi.org/10.1007/s11663-016-0900-x

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  • DOI: https://doi.org/10.1007/s11663-016-0900-x

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