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Nanocrystallization in Ni60Ta40 and Ni60Nb40 metallic glasses below calorimetric glass transition

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Abstract

Crystallization of Ni60Ta40 and Ni60Nb40 metallic glasses at temperatures well below their respective calorimetric glass transition temperatures has been studied by differential scanning calorimetry, nanodiffraction, and electron microscopies. Nanometer-scaled metastable FCC phases were found to grow out from the glass structures. The Z-contrast images reveal that the nanocrystals are enriched in Ta or Nb in comparison with the surrounded amorphous structures. The experimental evidence is suggestive of the decoupled cooperative diffusion of Ni atoms in these fragile glasses.

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Acknowledgements

The author Wang Yingmin thanks the useful discussion with professor Wang Weihua. The TEM and STEM investigation was performed on the TEM platform for dielectrics research, Xi’an Jiaotong University, China. This work was supported by the Natural Science Foundation of China (Nos. 51131002 and 51041011), the Fundamental Research Funds for the Central Universities (No. DUT12LAB08), and the Scientific Research Foundation for the Returned Overseas Chinese Scholars by the Ministry of Education of China.

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Authors and Affiliations

  1. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian, 116024, China

    Yingmin Wang, Yongfei Li, Jianbing Qiang, Yaoxiang Geng, Qing Wang & Chuang Dong

  2. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China

    Yingmin Wang, Yongfei Li, Jianbing Qiang, Yaoxiang Geng, Qing Wang & Chuang Dong

  3. International Center for Dielectric Research, Xi’an Jiaotong University, Xi’an, 710049, China

    Shao-Bo Mi

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  1. Yingmin Wang
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  2. Yongfei Li
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  3. Jianbing Qiang
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  4. Yaoxiang Geng
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  5. Qing Wang
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Correspondence to Jianbing Qiang or Shao-Bo Mi.

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Wang, Y., Li, Y., Qiang, J. et al. Nanocrystallization in Ni60Ta40 and Ni60Nb40 metallic glasses below calorimetric glass transition. J Mater Sci 49, 6007–6011 (2014). https://doi.org/10.1007/s10853-014-8319-8

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  • DOI: https://doi.org/10.1007/s10853-014-8319-8

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