Frontiers of Physics

, 14:63604 | Cite as

Thermally activated phase transitions in Fe-Ni core-shell nanoparticles

  • Jin-Bo Wang
  • Rao HuangEmail author
  • Yu-Hua WenEmail author
Research Article


Fe-Ni core-shell nanoparticles are versatile functional materials, and their thermal stabilities are crucial for their performances in operating conditions. In this study, the thermodynamic behaviors of Fe-Ni core-shell nanoparticles are examined under continuous heating. The solid-solid phase transition from body centered cubic (bcc) to face centered cubic (fcc) in the Fe core is identified. The transition is accompanied with the generation of stacking faults around the core-shell interface, which notably lowers the melting points of the Fe-Ni core-shell nanoparticles and causes even worse thermal stability compared with Ni ones. Moreover, the temperature of the structural transformation is shown to be tuned by modifying the Ni shell thickness. Finally, the stress distributions of the core and the shell are also explored. The relevant results could be helpful for the design, preparation, and utilization of Fe-based nanomaterials.


core-shell metallic nanoparticle phase transition molecular dynamics 



This work was supported by the National Natural Science Foundation of China (Grant Nos. 11474234 and 51871189).


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Copyright information

© Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Physics, Jiujiang Research Institute and Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient DevicesXiamen UniversityXiamenChina

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