Synthesis of Sm2Co17 alloy nanoparticles by mechanochemical processing

Wenge Liu, Paul Mccormick

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    37 Citations (Scopus)


    Sm2Co17 alloy nanoparticles of 10-250 nm in size were prepared by mechanochemical processing involving the co-reduction of Sm2O3 and CoO with Ca. The crystal structure of the nano-sized Sm2Co17 particles was mainly of the ordered Th2Zn17-type. When embedded in the CaO matrix the Sm,Co,, nanoparticles exhibited a high coercivity of 14.2 kOe. The CaO by-product could be removed by a carefully controlled washing process without significant oxidation of the ultrafine alloy particles. After washing, the cold-pressed powder exhibited a coercivity value of 11.8 kOe and a maximum magnetization of 92.0 emu/g under an applied field of 50 kOe. (C) 1999 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)279-283
    JournalJournal of Magnetism and Magnetic Materials
    Issue number2
    Publication statusPublished - 1999


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