The authors have successfully developed a low-cost anisotropic NdFeB magnet powder with high coercivity value of 18kOe without any Dy additives by diffusion processing of Nd-Cu-Al element to anisotropic magnet powder produced by the d-HDDR method. This enhancement mechanism is to isolate the magnetic couple between grain of Nd2Fe14B phase by creation of non-magnetic grain boundaries of Nd and Cu. By surface coating on this anisotropic magnet powder, the long-term aging loss behavior under air at 150deg.C has been improved by 6% after 1,000hr compared to current MAGFINE material without powder surface coating. By using this new anisotropic bonded magnet (New-MAGFINE), small automotive motors with excellent thermal stability and low cost characteristics have become possible.


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    Title :

    Development of dy-free NdFeB anisotropic bonded magnet (New MAGFINE)


    Contributors:
    Noguchi, K. (author) / Mishima, C. (author) / Yamazaki, M. (author) / Matsuoka, H. (author) / Mitarai, H. (author) / Honkura, Y. (author)


    Publication date :

    2011-09-01


    Size :

    1296169 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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