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Combined Electromagnetic and Mechanical Ultrasound for Particle Dispersion in Liquid Metals

  • Metal Matrix Composites: Analysis, Modeling, Observations and Interpretations
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Abstract

It is known that acoustic cavitation is one of the mechanisms resulting in the dispersion of small particles in liquid metallic alloys. Previous research has shown that the contactless electromagnetic method can be used to induce such cavitation and disperse particles in metals, where the application of a high-frequency alternating magnetic field plus a static magnetic field results in pressure oscillations that can become strong enough to disperse particles. Promising results have been obtained on the laboratory scale for some metal/particle pairs such as tin/silicon carbide (Sn/SiC) and chrome steel/titanium nitride (FeCr/TiN). We present herein the idea of combining such electromagnetically induced ultrasound with the application of mechanical ultrasound to a liquid melt to achieve enhanced particle mixing and dispersion. This combined method allows the achievement of a strong oscillating pressure with simultaneous significant stirring of the melt. This approach has the potential to stir and disperse particles in a single-stage process.

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Acknowledgements

This work is supported by a PostDoc Latvia postdoctoral research grant “Electromagnetic methods for metal matrix nano-composite production” No. 1.1.1.2/VIAA/2/18/264.

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  1. Institute of Physics, University of Latvia, Jelgavas Street 3, Riga, 1004, Latvia

    Imants Kaldre & Andris Bojarevics

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  1. Imants Kaldre
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  2. Andris Bojarevics
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Correspondence to Imants Kaldre.

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Kaldre, I., Bojarevics, A. Combined Electromagnetic and Mechanical Ultrasound for Particle Dispersion in Liquid Metals. JOM 72, 2892–2897 (2020). https://doi.org/10.1007/s11837-020-04160-1

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  • DOI: https://doi.org/10.1007/s11837-020-04160-1

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