Theoretical and experimental investigations of the process of vibration treatment of liquid metals containing nanoparticles

doi:10.1007/s11837-016-2147-z

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DOI Доступ к ресурсу на сайте издателя			10.1007/s11837-016-2147-z

Title: Theoretical and experimental investigations of the process of vibration treatment of liquid metals containing nanoparticles
Creator: Vorozhtsov, Sergey A.
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Promakhov, Vladimir V.
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Dammer, Vladislav Kh.
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Vorozhtsov, Alexander B.
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Kudryashova, Olga B.
Date: 2016
DOI: 10.1007/s11837-016-2147-z
Description: It is known that the use of external effects, such as acoustic fields (from ultrasonic to low-frequency range), help in breaking down agglomerates, improving particle wettability, providing uniform particle distribution in the melt volume, and reducing the grain size. The fragmentation of growing crystals, de-agglomeration of particles and their mixing in liquid metal under the influence of vibration (with frequencies of 10–100 Hz) are considered in this paper. The major advantage of such a technique in comparison with high-frequency methods (sonic, ultrasonic) is the capability of processing large melt volumes proportional to the wavelength. The mechanisms of the breaking down of particle agglomerates and the mixing of particles under conditions of cavitation and turbulence during the vibration treatment of the melt are considered. Expressions linking the threshold intensity and frequency with the amplitude necessary to activate mechanisms of turbulence and cavitation were obtained. The results of vibration treatment experiments for an aluminum alloy containing diamond nanoparticles are given. This treatment makes it possible to significantly reduce the grain size and to improve the casting homogeneity and thus improve the mechanical properties of the alloy.

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collection(s): Физико-технический факультет | НИИ прикладной математики и механики
Identifier: смотреть в электронном каталоге НБ ТГУ
Type: статьи в журналах
Source: JOM. 2016. Vol. 68, № 12. P. 3094-3100
Language: eng

Created: 04-10-2017

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НИИ прикладной математики и механики Theoretical and experimental investigations of the process of vibration treatment of liquid metals containing nanoparticles