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首页> 外文会议>International Conference on Rare Earth Research and Application; 20060625-30; Beijing(CN) >Homogeneity of H_(cj) in Sintered Bulk Nd-Fe-B Magnets
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Homogeneity of H_(cj) in Sintered Bulk Nd-Fe-B Magnets

机译：烧结块状Nd-Fe-B磁体中H_（cj）的均质性

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摘要

High performance magnets not only have high magnetic properties, but also have good homogeneity. The homogeneous of Nd_(14.2)Dy_xAl_(0.8)Cu_(0.1)B_(6.2)Fe_(bal). Bulk magnets was studied. The sizes of the samples produced by conventional sintering process were 53 × 50.5 × 25.3/40.2/50.4/61.0 mm. The magnetic character and microstructure of the samples were determined by NIM-10000H hysteresigraph, optical metaloscope, and SEM respectively. The results show that the H_(cj) reduces with increasing C content at the same process parameters. And the H_(cj) shows dependence not only on the ageing processing but also on the size of the bulk and loading capacity etc. The H_(cj) increases with prolonging ageing time and the ageing time should be different with different size of the bulk. With the increase of the loading capacity, the H_(cj) reduces promptly and is very inhomogeneous. The microstructure of the samples shows that the grain of the hard magnetic phase is finer and the neodymium-rich boundary is distributed homogeneously with prolonging ageing time. And so is the sample in a small amount of the bulks.
机译：高性能磁体不仅具有高磁性能，而且具有良好的均匀性。 Nd_（14.2）Dy_xAl_（0.8）Cu_（0.1）B_（6.2）Fe_（bal）的均质。研究了大块磁体。通过常规烧结工艺制备的样品的尺寸为53×50.5×25.3 / 40.2 / 50.4 / 61.0mm。分别用NIM-10000H磁滞扫描仪，光学金相显微镜和SEM测定样品的磁性和显微结构。结果表明，在相同的工艺参数下，H_（cj）随着碳含量的增加而降低。而且，H_（cj）不仅显示出时效处理的依赖性，还显示出其体积和装载量等的相关性。随着时效时间的延长，H_（cj）会增加，并且随着体积的不同，时效时间也应有所不同。随着负载能力的增加，H_（cj）迅速减小并且非常不均匀。样品的显微组织表明，硬磁相的晶粒更细，富钕边界均匀地分布，且时效时间延长。少量的样品也是如此。

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