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Containerless solidification of acoustically levitated Ni–Sn eutectic alloy

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Abstract

Containerless solidification of Ni–18.7at%Sn eutectic alloy has been achieved with a single-axis acoustic levitator. The temperature, motion, and oscillation of the sample were monitored by a high speed camera. The temperature of the sample can be determined from its image brightness, although the sample moves vertically and horizontally during levitation. The experimentally observed frequency of vertical motion is in good agreement with theoretical prediction. The sample undergoes shape oscillation before solidification finishes. The solidification microstructure of this alloy consists of a mixture of anomalous eutectic plus regular lamellar eutectic. This indicates the achievement of rapid solidification under acoustic levitation condition.

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Acknowledgements

This work is financially supported by the National Natural Science Foundation of China (Grant Nos. 50971105, 51071126, and 11104223). The authors are grateful to Dr. F.P. Dai, Dr. N. Yan, and Dr. Z.Y. Hong for their help and discussion during the experiments.

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Authors and Affiliations

  1. Department of Applied Physics, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    D. L. Geng, W. J. Xie & B. Wei

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  1. D. L. Geng
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  2. W. J. Xie
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  3. B. Wei
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Correspondence to B. Wei.

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Geng, D.L., Xie, W.J. & Wei, B. Containerless solidification of acoustically levitated Ni–Sn eutectic alloy. Appl. Phys. A 109, 239–244 (2012). https://doi.org/10.1007/s00339-012-7041-0

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  • DOI: https://doi.org/10.1007/s00339-012-7041-0

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