Enhanced magnetic properties in rapidly solidified Nd-Fe-B based alloys

Abstract The paper presents the results of a systematic investigation of the influence of melt-spinning processing conditions on the grain size in the nanocrystalline range and on the magnetic properties of Nd-Fe-B alloys with small silicon additions. The relationships between remanence, coercivity and grain size are established and discussed. The enhanced remanence observed, M r / M s > 0.5, has been shown to be due to ultra fine grain size below 20 nm.

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