The effect of Al substitution on the coercivity of Nd-Fe-B magnets
The effect of Al substitution on the coercivity of Nd-Fe-B magnets
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DOI：
10.1063/1.342309
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发表时间：
1988-11
期刊：
影响因子：
--
通讯作者：
J. Strzeszewski;G. Hadjipanayis;A. Kim
中科院分区：
文献类型：
--
作者：
J. Strzeszewski;G. Hadjipanayis;A. Kim
The effect of Al on the coercivity of Nd‐Dy‐Fe(Al)B magnets has been investigated with magnetic measurements, differential scanning calorimetry, and microstructure studies. The Al containing samples were found to have a much higher coercivity, a relatively steeper initial magnetization, a different Hc(Hef) curve, and a larger temperature coefficient of coercivity than the samples without Al. Morphology studies made with a scanning transmission electron microscope did not show any significant differences between the two samples. The only evident difference, found in x‐ray and electron diffraction data, was in the c/a ratio of the Nd2Fe14B tetragonal phase which was higher for the sample with Al. Another difference was observed in the magnetization reversal mechanism. In the Al‐containing samples the magnetization is reversed by changing the magnetization of entire grains, while for the samples without Al the magnetization is reversed by dividing into domains inside the grains.
