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Bimodal growth of the nanophases in the dual-phase composites produced by mechanical alloying in immiscible Cu–Ag system

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Abstract

Annealing was carried out to produce Ag–Cu dual-nanophase composite by decomposing Ag–Cu supersaturated solid solution prepared by ball-milling. Differential scanning calorimetry, X-ray diffraction, and transmission electron microscopy were used to characterize the growth kinetics of the nanophase composite upon heating. The results show that bimodal growth kinetics is obeyed in the dual-nanophase system. The coarsening of the second phase of small volume fraction follows the cubic law of LSW theory, while the grain growth of matrix phase follows the kinetic equation of the grain growth of pure nanocrystalline metals. In both cases, the growth is controlled by grain boundary diffusion.

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Acknowledgements

The financial supports from Ministry of Education of China (IRT 0551) and Guangdong Provincial Natural Science Foundation (Team Project) are greatly acknowledged.

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Authors and Affiliations

  1. School of Mechanical Engineering, South China University of Technology, Guangzhou, 510640, China

    M. Zhu, Z. F. Wu, M. Q. Zeng, L. Z. Ouyang & Y. Gao

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  1. M. Zhu
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  2. Z. F. Wu
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  3. M. Q. Zeng
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  4. L. Z. Ouyang
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  5. Y. Gao
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Correspondence to M. Zhu.

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Zhu, M., Wu, Z.F., Zeng, M.Q. et al. Bimodal growth of the nanophases in the dual-phase composites produced by mechanical alloying in immiscible Cu–Ag system. J Mater Sci 43, 3259–3266 (2008). https://doi.org/10.1007/s10853-008-2545-x

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  • DOI: https://doi.org/10.1007/s10853-008-2545-x

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