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Purification of Mg–Gd–Zr Alloys With Pulsed Electric Current

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Abstract

The addition of rare earth elements has a strong purification ability because it reduces the number of inclusions with size greater than 10 µm in rare earth magnesium alloys. However, the residual small inclusions are difficult to separate due to Brownian motion, which seriously reduces the mechanical property of magnesium alloys. In this study, using the conductivity difference between the inclusion and the melt, the electric driving force for purifying rare earth magnesium alloy, which is not affected by the size of the inclusion, is introduced. Compared with the static precipitation method, the pulsed electric current purification method can remove up to 63 pct of the inclusions in 10 minutes. The electromagnetic purification technology has the advantages of fast, efficient and environmental protection, which provides a new idea for further optimizing the property of rare earth magnesium alloys.

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Acknowledgments

The work was financially supported by the National Natural Science Foundation of China (Grant Number U21B2082), Beijing Municipal Natural Science Foundation (Grant Number 2222065), and Fundamental Research Funds for the Central Universities (Grant Number FRF-TP-22-02C2).

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Authors and Affiliations

  1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing (USTB), Beijing, 100083, P.R. China

    Ying Feng, Changhao Liu, Xiaoshan Huang & Xinfang Zhang

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  1. Ying Feng
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  2. Changhao Liu
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  3. Xiaoshan Huang
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Correspondence to Xinfang Zhang.

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Feng, Y., Liu, C., Huang, X. et al. Purification of Mg–Gd–Zr Alloys With Pulsed Electric Current. Metall Mater Trans B 54, 2467–2478 (2023). https://doi.org/10.1007/s11663-023-02848-8

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  • DOI: https://doi.org/10.1007/s11663-023-02848-8

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