Magnetic property and microstructure of Nd-Fe-B-M (M = Si, C) bulk nanocomposite magnets prepared by spark plasma sintering method
説明
We have prepared Nd2Fe14B/(a-Fe or Fe3B) bulk nanocomposite magnets at the compositions of Nd4Fe77.5B18.5-xMx (M = Si, C) by substituting other elements M for B. In the case of the Si substitution, the saturation magnetization is found to increase while the coercivity remains the same at 1 at.%Si. In the case of the C substitution, the magnetic behavior becomes drastically softer for more than 1at.%C, which is attributed to the suppression of the Nd2Fe14B hard phase. Finally, the grain sizes of the Nd2Fe14B and the Fe3B phases are found to depend on the ramp-up time, and the reduction of the grain size results in an increase of the coercivity.
収録刊行物
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- Journal of Physics: Conference Series
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Journal of Physics: Conference Series 106 012015-, 2008-03-01
IOP Publishing
