Zn diffusion induced precipitation along grain boundaries in Zn-coated NdFeB magnets

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Diffusion induced precipitation along grain boundaries has been observed in Zn-coated NdFeB magnets. It was found that the volume diffusion of Zn through the matrix Nd2Fe14B grains is negligible. Zn penetrates into a thin outer layer of each Nd2Fe14B grain replacing Fe atoms in the Nd2Fe14B lattice and forming Nd-Fe-Zn (B) compounds. The displaced Fe moves to the boundaries, reacting with further Zn to produce Zn-Fe compounds. (C) 2002 Elsevier Science B.V. All rights reserved.


Original languageEnglish
Pages (from-to)13-20
Number of pages8
JournalJournal of Magnetism and Magnetic Materials
Issue number1-2
Publication statusPublished - 1 Apr 2003


  • tem, diffusion, grain boundaries, Zn-coating, NdFeB