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Microstructure Evolution of the Proeutectic Cu Dendrites in Diamagnetic Cu-Ag Alloys by Electromagnetic Suppressing Convection

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Abstract

The influence of a 12 T high static magnetic field on microstructures of the proeutectic Cu dendrites in the diamagnetic Cu-Ag alloy has been investigated. Our experimental results show that the length of the Cu dendrites arm is decreased by 10 % and the dendrite arm spacing is increased when the Cu-25 %Ag alloys are solidified in a 12 T static magnetic field. The applied magnetic field also enriches the average weight percent of Ag in Cu dendrites. Our analysis demonstrates that these effects are essentially attributed to the solute redistributions and temperature gradients of the convection suppression by the electromagnetic forces.

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Acknowledgements

The authors would like to acknowledge the financial supports from the National High Technology Research and Development Program of China (No. 2007AA03Z519), National Natural Science Foundation of China (Nos. 51004038 and 50901019), the 111 Project of China (No. B07015) and Wuhan National High Magnetic Field Center (No. WHMFCKF2011007). We thank specially Wuhan National High Magnetic Field Center for giving us helps to do the PPMS measurements.

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Authors and Affiliations

  1. Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, 110004, China

    X. W. Zuo, C. C. Zhao, E. G. Wang, L. Zhang & J. C. He

  2. National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, FL, 32310, USA

    K. Han

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  1. X. W. Zuo
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  2. C. C. Zhao
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  3. E. G. Wang
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Correspondence to X. W. Zuo.

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Zuo, X.W., Zhao, C.C., Wang, E.G. et al. Microstructure Evolution of the Proeutectic Cu Dendrites in Diamagnetic Cu-Ag Alloys by Electromagnetic Suppressing Convection. J Low Temp Phys 170, 409–417 (2013). https://doi.org/10.1007/s10909-012-0743-z

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