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Influence of calcium addition and stirring on the cellular structure and foaming behavior of molten zinc

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Abstract

In this paper, the influence of calcium addition and melt stirring on the structure and foaming behavior of molten zinc was investigated. In this regard, zinc foam was produced by Alporas method (in which foam alloy melts and titanium hydride is used as a blowing agent). Optical microscopy and scanning electron microscopy were used to investigate the phase distribution and structure in the foams. Results showed that addition of calcium increased foamability and foam efficiency of the molten zinc. In contrast, stirring had no significant effect on the foaming behavior of the melt. Microstructural examinations indicated that improving the foaming behavior of molten zinc was attributed to the formation of CaZn13 intermetallic phase and ZnO particles in the foam structure, which increased viscosity and reduced drainage rate.

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Authors and Affiliations

  1. Department of Materials Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran

    S. Hossein Elahi, R. Arabi Jeshvaghani & H. R. Shahverdi

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  1. S. Hossein Elahi
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  2. R. Arabi Jeshvaghani
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  3. H. R. Shahverdi
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Correspondence to H. R. Shahverdi.

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Hossein Elahi, S., Arabi Jeshvaghani, R. & Shahverdi, H.R. Influence of calcium addition and stirring on the cellular structure and foaming behavior of molten zinc. Appl. Phys. A 119, 533–538 (2015). https://doi.org/10.1007/s00339-015-8985-7

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  • DOI: https://doi.org/10.1007/s00339-015-8985-7

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