Influence of additional nanoparticles on coercivity of sintered Nd–Fe–B magnets

Nguyen Van Duong, Pham Thi Thanh, Nguyen Hai Yen, Nguyen Mau Lam, Nguyen Huy Ngoc, Duong Dinh Thang, Nguyen Le Thi, Nguyen Hoang Ha, Dinh Huu Quang, Nguyen Cong Ngoc and Nguyen Huy Dan

  • ANSN Editor
Keywords: nano


In this work, we investigated the influence of concentration of the additional nanoparticles of Dy40Nd30Al30 and Nd30Al30 on the coercivity of the sintered Nd16.5Fe77B6.5 magnets. Composition and concentration of the additional compounds clearly influence magnetic properties of the magnets. The coercivity (HC) increases linearly from 8 kOe  to 13 kOe with increasing the weight fraction of the Dy40Nd30Al30 nanoparticles from 0 to 5%. Meanwhile, the HC of the Nd30Al30 added magnets reaches a maximal value of 10 kOe  at the optimum addition of 3 wt%. The quite high maximum energy products, (BH)max > 30 MGOe, were also obtained for the magnets added with the nanoparticles

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