Journal of Materials Engineering and Performance

, Volume 25, Issue 8, pp 3303–3309 | Cite as

Observation of Pseudopartial Grain Boundary Wetting in the NdFeB-Based Alloy

  • B. B. StraumalEmail author
  • A. A. Mazilkin
  • S. G. Protasova
  • G. Schütz
  • A. B. Straumal
  • B. Baretzky


The NdFeB-based alloys were invented in 1980s and remain the best-known hard magnetic alloys. In order to reach the optimum magnetic properties, the grains of hard magnetic Nd2Fe14B phase have to be isolated from one another by the (possibly thin) layers of a non-ferromagnetic Nd-rich phase. In this work, we observe that the few-nanometer-thin layers of the Nd-rich phase appear between Nd2Fe14B grains due to the pseudopartial grain boundary (GB) wetting. Namely, some Nd2Fe14B/Nd2Fe14B GBs are not completely wetted by the Nd-rich melt and have the high contact angle with the liquid phase and, nevertheless, contain the 2-4-nm-thin uniform Nd-rich layer.


grain boundaries hard magnetic materials phase transitions wetting 



This work was performed under the partial financial support of Russian Foundation for Basic Research (Grants 14-42-03621, 15-03-01127, and 15-53-06008), Israeli Ministry of Science, Technology and Space, and Karlsruhe Nano Micro Facility operated by the by the Karlsruhe Institute of Technology.


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Copyright information

© ASM International 2016

Authors and Affiliations

  • B. B. Straumal
    • 1
    • 2
    • 3
    Email author
  • A. A. Mazilkin
    • 1
    • 2
  • S. G. Protasova
    • 1
    • 4
  • G. Schütz
    • 4
  • A. B. Straumal
    • 1
    • 3
  • B. Baretzky
    • 2
  1. 1.Institute of Solid State Physics, Russian Academy of SciencesChernogolovka, Moscow DistrictRussia
  2. 2.Karlsruher Institut für TechnologieInstitut für NanotechnologieEggenstein-LeopoldshafenGermany
  3. 3.National University of Science and Technology (MISIS)MoscowRussia
  4. 4.Max-Planck-Institute for Intelligent SystemsStuttgartGermany

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