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First-principles study on the effect and magnetism of iron segregation in Cu grain boundary

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Abstract

The atomic configurations and electronic structures of iron on CuΣ5 symmetrical tilt grain boundary (GB) have been studied based on the density functional theory. Different segregation positions of iron are considered. A weak tendency of iron segregating to GB is arrived due to the segregation energy. In addition, iron segregation shows a cohesion strengthening effect of Cu GB according to Rice–Wang model, which is mainly contributed by the charge redistribution. Finally, an enhancement of the local magnetic moment of iron in Cu GB or bulk or surface is explored due to larger atomic volume than the FCC iron crystal and the Cu atoms surrounding iron are slightly polarized by the doped iron. This study can enrich the understanding of the effects of iron on the cohesion of Cu–Fe alloy and also might supply an indirect guidance to expand the application of Cu–Fe alloy in electronic device manufacture field.

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Acknowledgements

This work was supported by the National Basic Researching Program of China (Grant No. 2011CB606403), the Fundamental Research Funds for the Central Universities of China (Grant No. N140108001) and Project of Education Department of Liaoning Province (Grant No. JL201615409). Computation time was provided by Shenyang Supercomputer Center at Institute of Metals Research.

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Authors and Affiliations

  1. Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China

    Fanshun Meng, Yongli Liu & Yang Qi

  2. School of Science, Liaoning University of Technology, Jinzhou, 121001, China

    Fanshun Meng

  3. School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou, 121001, China

    Xiaoming Lu

  4. Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang, 110819, China

    Yang Qi

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  1. Fanshun Meng
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  2. Xiaoming Lu
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Correspondence to Yang Qi.

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Meng, F., Lu, X., Liu, Y. et al. First-principles study on the effect and magnetism of iron segregation in Cu grain boundary. J Mater Sci 52, 4309–4322 (2017). https://doi.org/10.1007/s10853-016-0526-z

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  • DOI: https://doi.org/10.1007/s10853-016-0526-z

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