Enhancement of coercivity in high remanence HDDR Nd-Fe-B powders

Enhancement of coercivity in high remanence HDDR Nd-Fe-B powders
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DOI：
10.1109/20.800496
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发表时间：
1999-05
期刊：
IEEE International Magnetics Conference
影响因子：
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通讯作者：
H. Nakamura;K. Kato;D. Book;S. Sugimoto;M. Okada;M. Homma
H. Nakamura;K. Kato;D. Book;S. Sugimoto;M. Okada;M. Homma
中科院分区：
其他
文献类型：
--
作者：
H. Nakamura;K. Kato;D. Book;S. Sugimoto;M. Okada;M. Homma

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发现了一种新型的HDDR（氢化、歧化、解吸、复合）工艺路线，即在低H/sub / 2的压力下加热合金，是获得高剩余物Nd-Fe-B三元粉末的有效途径，并且矫顽力没有大的降低（这是以前的HDDR工艺路线中合金在真空下加热的问题）。添加0.5% Ga的合金矫顽力高达1.0 MAm/sup -1/，且残余没有退化（Br=1.4 T）。
A new type of HDDR (Hydrogenation, Disproportionation, Desorption, Recombination) processing route, in which alloys are heated up under a low pressure of H/sub 2/ for the disproportionation stage, was found to be an effective way of obtaining high remanence Nd-Fe-B ternary powders, with no large decrease in coercivity (which was the problem with the previous HDDR processing route, in which the alloys were heated under vacuum), The alloys with 0.5% Ga addition exhibited high coercivities of 1.0 MAm/sup -1/ with no degradation in remanence (Br=1.4 T),.